ACETYL TETRAPEPTIDE-5

WHAT IS ACETYL TETRAPEPTIDE-5?

Acetyl Tetrapeptide-5, also known as N-acetyl-beta-alanyl-L-histidyl-L-seryl-L-histidine and N-acetyl-β-alanyl-L-histidyl-L-seryl-L-histidine, is a synthetic acetylated tetrapeptide used as a cosmetic active ingredient, particularly in products developed for the eye contour. A tetrapeptide contains four amino-acid-derived residues linked through peptide bonds. In this cosmetic tetrapeptide, the peptide sequence is commonly represented as Ac-beta-Ala-His-Ser-His-OH.

The structure contains beta-alanine, histidine and serine residues and carries an acetyl group at the N-terminal portion of the molecule. The systematic chemical description is N-acetyl-beta-alanyl-L-histidyl-L-seryl-L-histidine, also written as N-acetyl-β-alanyl-L-histidyl-L-seryl-L-histidine. The ingredient is identified in cosmetic ingredient nomenclature as ACETYL TETRAPEPTIDE-5.

In practical cosmetic formulation, this cosmetic tetrapeptide is best understood as a water-compatible specialty peptide rather than as an emollient, conventional moisturizer, preservative, surfactant or rheology modifier. It is normally introduced in relatively small active quantities and used to complement the structural ingredients that create the finished serum, gel, cream or patch. Its strongest market association is with under-eye care.

The anti-puffiness peptide, also known as Acetyl Tetrapeptide-5 and N-acetyl-β-alanyl-L-histidyl-L-seryl-L-histidine, has been developed and promoted for cosmetic formulations addressing the visible appearance of puffiness and eye bags. These benefits should be expressed in cosmetic terms. This under-eye peptide is not a pharmaceutical treatment for edema, vascular disease or other medical conditions.

A cosmetic eye serum containing the peptide is designed to improve appearance rather than diagnose, prevent or treat disease. This distinction is relevant to both formulators and marketing teams. Finished-product claims must remain appropriate for the regulatory category and must be supported by the evidence available for the actual formulation.

A generic high-purity peptide and a diluted peptide solution can have the same active molecule while differing substantially in carrier composition, active concentration, preservation, documentation and recommended processing. For this reason, a purchasing specification should not simply state “N-acetyl-beta-alanyl-L-histidyl-L-seryl-L-histidine.” It should define the required product form, peptide assay or concentration, carrier system, quality requirements and intended application.

COMMON PRODUCT AND CHEMICAL NAMES

Acetyl Tetrapeptide-5
ACETYL TETRAPEPTIDE-5
Acetyl tetrapeptide 5
Acetyl-Tetrapeptide-5
N-Acetyl-beta-alanyl-L-histidyl-L-seryl-L-histidine
N-acetyl-β-alanyl-L-histidyl-L-seryl-L-histidine
Ac-βAla-His-Ser-His-OH
Ac-beta-Ala-His-Ser-His-OH
Acetylated Tetrapeptide
Cosmetic Tetrapeptide
Eye Contour Peptide
Anti-Puffiness Peptide
Under-Eye Peptide
Eye Bag Peptide
Periorbital Cosmetic Peptide
Synthetic Cosmetic Peptide
Acetyl Tetrapeptide-5 Powder
Acetyl Tetrapeptide-5 Solution
Acetyl Tetrapeptide-5 Cosmetic Grade
Acetyl Tetrapeptide-5 Raw Material
Acetyl Tetrapeptide-5 Active Ingredient
Acetyl Tetrapeptide-5 Peptide Solution
CAS 820959-17-9
UNII Y1DFQ308G8
Not all of these expressions have exactly the same technical meaning. Acetyl Tetrapeptide-5 is the standardized cosmetic ingredient name, while N-acetyl-beta-alanyl-L-histidyl-L-seryl-L-histidine describes the chemical structure more explicitly. Ac-βAla-His-Ser-His-OH represents the peptide sequence and terminal functionality.

Expressions such as eye contour peptide, anti-puffiness peptide and under-eye peptide describe common cosmetic positioning rather than alternative systematic chemical names. Likewise, Acetyl Tetrapeptide-5 powder and acetylated tetrapeptide solution are not interchangeable descriptions. A powder may consist predominantly of peptide, whereas a commercial solution may contain only a small percentage of N-acetyl-β-alanyl-L-histidyl-L-seryl-L-histidine in water, glycerin, butylene glycol or another carrier.

Users searching for this raw material may therefore use technical, formulation and commercial queries such as N-acetyl-beta-alanyl-L-histidyl-L-seryl-L-histidine CAS number, cosmetic tetrapeptide INCI, N-acetyl-β-alanyl-L-histidyl-L-seryl-L-histidine molecular weight, acetylated tetrapeptide peptide sequence, acetylated tetrapeptide solubility, eye contour peptide eye cream, eye bag peptide for eye bags, anti-puffiness peptide for puffiness, under-eye peptide formulation, cosmetic tetrapeptide use level, acetylated tetrapeptide powder, acetylated tetrapeptide solution, eye contour peptide supplier, cosmetic tetrapeptide distributor, synthetic cosmetic peptide wholesale, acetylated tetrapeptide bulk and under-eye peptide price. A technically useful product page must answer these different search intents without treating them as unrelated keywords.

CAS NO, EC / EINECS NO AND INCI NAME
Product name: Acetyl Tetrapeptide-5
INCI name: ACETYL TETRAPEPTIDE-5
Chemical name: N-acetyl-beta-alanyl-L-histidyl-L-seryl-L-histidine
CAS No: 820959-17-9
EC / EINECS No: No specific EC / EINECS number has been reliably identified for Acetyl Tetrapeptide-5 in the principal records normally used to establish the identity of this ingredient.

UNII: Y1DFQ308G8
Molecular formula: C20H28N8O7
Molecular weight: approximately 492.49 g/mol
Peptide representation: Ac-βAla-His-Ser-His-OH
Chemical class: Synthetic acetylated tetrapeptide
Primary commercial category: Cosmetic active ingredient
Principal formulation category: Water-compatible peptide active
Principal cosmetic application: Eye contour and advanced skin care products

For Acetyl Tetrapeptide-5 cosmetic grade, the CAS number 820959-17-9 is an important identifier because commercial names and peptide descriptions can vary between suppliers. Purchasing departments should therefore use the CAS number together with the INCI name, peptide sequence and supplier specification when confirming identity.

The absence of a clearly established EINECS number should not be resolved by assigning an unrelated EC number. EC and EINECS identifiers are inventory identifiers and should only be stated when supported by the relevant substance record. For regulatory documentation, the exact information appearing on the manufacturer's current SDS, TDS, specification and COA should be used.

An INCI listing also should not be interpreted as blanket authorization for every concentration, market, product category or claim. Cosmetic compliance depends on the finished product, intended market, formulation, safety assessment, claims and applicable regulations.

CHEMICAL STRUCTURE AND MOLECULAR PROPERTIES OF ACETYL TETRAPEPTIDE-5
Acetyl Tetrapeptide-5 is built from a short sequence containing beta-alanine, histidine, serine and histidine residues.

Its commonly used condensed representation is: Ac-βAla-His-Ser-His-OH

The “Ac” designation indicates N-terminal acetylation. The C-terminal portion remains represented as a carboxylic acid group, indicated by “OH” in the condensed peptide notation. This structure gives Acetyl Tetrapeptide-5 a very different physicochemical profile from lipid-soluble cosmetic actives such as retinol, tocopherol or many botanical oil components.

The molecule contains numerous polar functional groups, including peptide amide bonds, imidazole-containing histidine side chains, a serine hydroxyl group and a terminal carboxylic acid. These functional groups contribute to its affinity for aqueous environments. Its molecular weight of approximately 492.49 g/mol is low compared with large proteins but substantially higher than many conventional small-molecule cosmetic ingredients.

The peptide bonds linking the residues are fundamental to its molecular identity. A mixture containing the same free amino acids would not be chemically equivalent to Acetyl Tetrapeptide-5 because the sequence, bonding pattern and terminal acetylation define the peptide. Histidine contributes imidazole groups capable of protonation behavior depending on pH.

Serine contributes a hydroxyl-containing side chain. Beta-alanine provides part of the N-terminal structure, while acetylation modifies the terminal amino functionality. These molecular characteristics help explain why Acetyl Tetrapeptide-5 is normally handled as a hydrophilic peptide and introduced through the aqueous portion of cosmetic formulations.

The peptide should not be confused with palmitoylated peptides. Palmitoyl peptides contain a long fatty-acid-derived chain that significantly increases lipophilic character. Acetyl Tetrapeptide-5 does not contain such a long lipid chain.

This distinction affects formulation behavior. Palmitoylated peptides may be supplied in carrier systems designed for their amphiphilic or lipid-associated character, whereas Acetyl Tetrapeptide-5 is generally suited to aqueous concentrates, gels and water-containing emulsions. Molecular identity also matters during quality control.

HPLC purity, peptide content, chromatographic profile and, where required, mass confirmation provide more meaningful information than appearance alone. Two white peptide powders may look identical while differing in sequence, purity, residual solvents, water content, counterions or degradation products. For technical purchasing, analytical identity is therefore considerably more important than visual similarity.

PHYSICAL AND CHEMICAL PROPERTIES OF ACETYL TETRAPEPTIDE-5
Acetyl Tetrapeptide-5 can be supplied either as a high-purity peptide solid or as a diluted cosmetic solution. This difference must be recognized before general physical properties are interpreted.

General identity:
Physical form: Powder/solid for high-purity peptide grades; liquid for commercial pre-diluted cosmetic solutions
Appearance of high-purity material: Typically white to off-white solid or powder, depending on grade and specification
Appearance of commercial solutions: Usually clear to transparent liquid, depending on carrier composition
Molecular formula: C20H28N8O7
Molecular weight: Approximately 492.49 g/mol
CAS No: 820959-17-9
INCI name: ACETYL TETRAPEPTIDE-5
Chemical character: Acetylated tetrapeptide
Water compatibility: Hydrophilic and suitable for aqueous formulation systems
Reported laboratory solubility: Soluble in suitable aqueous media; exact solubility depends on grade and test conditions
Odor: High-purity peptide is not normally selected for fragrance contribution; commercial solution odor depends on carrier system
Color: High-purity grades are generally white/off-white; solutions are commonly colorless to transparent
Active concentration: Grade dependent
pH: A meaningful pH specification applies primarily to an aqueous solution or dispersion and depends on the commercial grade
Purity: Grade dependent and should be confirmed through the specification and COA

The physical properties of a commercial peptide solution are largely influenced by its carrier. A solution containing water and glycerin will have a different viscosity, density, preservation requirement and processing behavior from one containing water and butylene glycol. Consequently, data from one commercial Acetyl Tetrapeptide-5 solution should not automatically be transferred to another supplier's product.

Some established commercial solutions contain approximately 0.1% active Acetyl Tetrapeptide-5. Such products may be recommended at percentages significantly higher than the concentration appropriate for a high-purity powder because most of the supplied material is carrier. This is one of the most important technical points in Acetyl Tetrapeptide-5 formulation.

If a 0.1% peptide solution is used at 1% in a finished cosmetic, the theoretical active peptide concentration is:
1% × 0.1% = 0.001% active Acetyl Tetrapeptide-5.

If the same solution is used at 5%:
5% × 0.1% = 0.005% active Acetyl Tetrapeptide-5.

At 10% solution addition:
10% × 0.1% = 0.01% active Acetyl Tetrapeptide-5. Therefore, an R&D document that simply states “Acetyl Tetrapeptide-5: 5%” is incomplete unless it identifies whether 5% refers to pure peptide, a stock solution or a specific commercial preparation.

This distinction also affects cost calculations. Purchasing departments should compare quotations according to actual peptide content rather than price per kilogram of diluted solution alone.

HOW DOES ACETYL TETRAPEPTIDE-5 WORK AT THE MOLECULAR AND FORMULATION LEVEL?
Acetyl Tetrapeptide-5 is primarily positioned as a cosmetic peptide for the visible characteristics of the eye contour. The under-eye region is structurally different from many other facial areas. The skin is relatively thin, changes in tissue support become visible easily, and several factors can contribute to the appearance of puffiness, shadows, discoloration and tired-looking skin.

Under-eye bags do not have a single cause. Visible puffiness can be influenced by temporary fluid accumulation, anatomical fat compartments, age-related structural changes, skin laxity and individual facial anatomy. Dark circles can similarly be associated with pigmentation, vascular visibility, shadowing, tissue transparency and structural changes.

A topical cosmetic peptide therefore cannot reasonably be expected to correct every type of eye bag or dark circle. N-acetyl-β-alanyl-L-histidyl-L-seryl-L-histidine is most logically positioned in formulations addressing the appearance of puffiness and supporting a smoother, better-hydrated eye contour. These proposed mechanisms provide a biochemical rationale for its use but should not be converted into pharmaceutical treatment claims.

Glycation is particularly relevant to anti-aging discussions because reactions between reducing sugars and proteins can contribute to the formation of advanced glycation end products and changes in structural proteins over time. From a cosmetic perspective, an ingredient positioned around glycation-related pathways can be incorporated into formulations designed to maintain a smoother and more resilient-looking skin appearance. The peptide's hydrophilic nature is equally important from a formulation standpoint.

Because Acetyl Tetrapeptide-5 is compatible with water-based systems, it can be introduced into light eye gels and serums without requiring the high oil load that would be needed for strongly lipophilic ingredients. This provides a practical advantage for the eye area, where consumers frequently prefer fast-absorbing, non-greasy formulations. Acetyl Tetrapeptide-5 can also be combined with ingredients that address complementary cosmetic objectives.

Caffeine may be selected for a familiar eye-care positioning. Hyaluronic acid or sodium hyaluronate can support hydration and surface plumping. Glycerin and propanediol contribute humectancy and formulation performance. Panthenol can support conditioning and comfort. Niacinamide can broaden the formula toward barrier support and tone-related positioning. Ceramides can be introduced where barrier-focused eye care is required.

Additional peptides can create a multi-peptide formulation with broader anti-aging positioning. The final performance is therefore determined by the complete formulation rather than N-acetyl-β-alanyl-L-histidyl-L-seryl-L-histidine alone.

WHAT PROBLEMS IS ACETYL TETRAPEPTIDE-5 USED TO ADDRESS?
Acetyl Tetrapeptide-5 is mainly selected for cosmetic formulations targeting visible under-eye puffiness and the appearance of eye bags. This does not mean every eye bag has the same biological origin or will respond equally to topical skin care. A formulator should distinguish between cosmetic puffiness and structural anatomical bulging. Temporary under-eye puffiness associated with visible fluid accumulation is conceptually different from prominent orbital fat compartments or pronounced structural changes. Cosmetic formulations can improve skin appearance but cannot reproduce surgical correction.

A second formulation objective is tired-looking eye contours. Consumers frequently describe the eye area using terms such as tired eyes, puffy eyes, eye bags, dark under-eyes or fatigued-looking skin. These descriptions often overlap even though their underlying causes differ.

Acetyl Tetrapeptide-5 allows a product developer to build a specialized eye-care formula rather than relying solely on generic moisturizing ingredients. Hydration is another relevant objective. A well-hydrated eye contour generally appears smoother and less emphasized by superficial dehydration lines.

Acetyl Tetrapeptide-5 can be integrated into humectant-rich systems containing glycerin, hyaluronic acid, betaine or panthenol. The ingredient can also support premium peptide positioning. For manufacturers, this is commercially useful because peptides provide a recognizable technical category that differentiates advanced eye serums from simple moisturizers. The peptide does not replace the need for a well-designed base formula. A poorly preserved, unstable or irritating eye product does not become technically successful merely because Acetyl Tetrapeptide-5 is included.

WHICH INDUSTRIES USE ACETYL TETRAPEPTIDE-5?
Acetyl Tetrapeptide-5 is considerably more specialized than broad industrial chemicals. Its principal commercial market is cosmetics and personal care.

Relevant sectors include:
Skin care manufacturing
Eye care cosmetics
Anti-aging cosmetics
Professional cosmetics
Dermocosmetic-style product development
Premium facial care
Private-label cosmetics
Contract cosmetic manufacturing
Hydrogel and eye patch manufacturing
Facial serum manufacturing
Cosmetic ingredient distribution
Cosmetic R&D
Peptide-based skin care development
Beauty brands developing eye contour products
Professional spa and aesthetic skin care products

Its use is concentrated in leave-on products because the value of a specialty peptide is generally better suited to formulations that remain on the skin than to rapidly rinsed products. Typical product categories include eye serums, eye creams, eye gels, eye masks, hydrogel patches, concentrated under-eye treatments, anti-aging facial serums and specialized moisturizers. N-acetyl-β-alanyl-L-histidyl-L-seryl-L-histidine may also appear in broader facial formulations where the brand wants to combine multiple peptides or extend an eye-care technology story into full-face products. Its suitability for a particular cosmetic application should be confirmed from the supplied grade's TDS and formulation guidance.

USE OF ACETYL TETRAPEPTIDE-5 IN EYE CONTOUR PRODUCTS
For Acetyl Tetrapeptide-5, eye contour formulations are the principal application area for Acetyl Tetrapeptide-5. An eye product containing this peptide can be designed around several complementary objectives: reducing the visible appearance of puffiness, supporting hydration, improving the appearance of fine dehydration lines and creating a smoother-looking eye contour. The vehicle should be chosen carefully. A light serum can maximize consumer perception of rapid absorption. A gel can provide freshness and allow compatibility with roll-on or pump packaging. An emulsion can provide additional emolliency for dry or mature skin.

A hydrogel patch can deliver a high-water-content sensory experience and keep the formulation in prolonged contact with the under-eye region. The peptide itself does not dictate which of these forms must be used. Instead, the formulator should evaluate consumer profile, packaging, preservation, stability and complementary active ingredients.

For a morning eye gel, caffeine, sodium hyaluronate and Acetyl Tetrapeptide-5 can provide a coherent formulation concept. For a richer night eye cream, N-acetyl-β-alanyl-L-histidyl-L-seryl-L-histidine may be combined with ceramides, humectants and carefully selected emollients. For hydrogel patches, the peptide can be introduced into the aqueous phase provided the hydrogel polymer system, preservative and processing conditions are compatible.

The delicate eye region also requires attention to fragrance, volatile components, surfactants and preservation. A technically impressive active system cannot compensate for a base that causes unacceptable eye-area discomfort.

ACETYL TETRAPEPTIDE-5 FOR UNDER-EYE PUFFINESS
“Acetyl Tetrapeptide-5 for puffy eyes” is one of the strongest search intents associated with the ingredient. N-acetyl-β-alanyl-L-histidyl-L-seryl-L-histidine became commercially recognized because of its positioning in eye-care formulations developed to reduce the visible appearance of puffiness. From an R&D perspective, the correct approach is not to promise elimination of every form of eye bag. Instead, the product can be designed to support a less puffy, smoother and refreshed-looking eye contour. This positioning can be strengthened through the choice of vehicle.

Lightweight gels are particularly suitable because consumers associate cooling, fast-spreading textures with morning eye care. Roll-on packaging can provide convenient localized application. Hydrogel patches create an intensive-use format. Serums allow combination with multiple water-compatible active ingredients. A formulation intended for puffiness should also avoid unnecessarily heavy sensory characteristics unless the target consumer specifically needs a rich cream. Acetyl Tetrapeptide-5 is therefore not simply an “ingredient for eye bags.” It is a technical tool that allows formulators to build a targeted cosmetic system around the visual concerns associated with the eye contour.

ACETYL TETRAPEPTIDE-5 FOR DARK CIRCLES
For Acetyl Tetrapeptide-5, dark circles are more complex than puffiness because several mechanisms can produce a dark appearance beneath the eyes. Pigmentation can contribute. Visible blood vessels beneath thin skin can contribute. Facial anatomy can create shadows. Age-related tissue changes may increase transparency or deepen the tear-trough area. Because these causes differ, no single cosmetic ingredient should be presented as a universal solution for all dark circles.

Acetyl Tetrapeptide-5 can nevertheless be incorporated into products positioned for tired-looking eye contours and the appearance of under-eye darkness, particularly where puffiness, tissue quality and hydration are part of the visual concern. For a broader dark-circle formula, formulators may consider complementary ingredients selected for pigmentation, hydration or barrier support, provided their stability and regulatory positioning are appropriate. The resulting formulation is more technically credible than expecting one peptide to address every possible cause of under-eye darkness.

ACETYL TETRAPEPTIDE-5 IN ANTI-AGING SKIN CARE
Acetyl Tetrapeptide-5 can be used beyond dedicated eye products. Multi-peptide facial serums increasingly combine peptides with humectants, niacinamide, hyaluronic acid and barrier-supporting ingredients. Within such systems, Acetyl Tetrapeptide-5 can contribute a specialized eye-contour and anti-glycation-related story while other peptides target different cosmetic pathways. N-acetyl-β-alanyl-L-histidyl-L-seryl-L-histidine should not automatically be described as a direct substitute for every anti-aging active.

Retinoids, vitamin C derivatives, niacinamide, palmitoylated peptides and hyaluronic acid work through different physicochemical or biological mechanisms. A sophisticated formula often benefits from combining compatible technologies rather than forcing them into direct competition. Acetyl Tetrapeptide-5 is particularly valuable where the manufacturer wants a peptide-based product with good compatibility with aqueous processing and a clear eye-care identity.

FORMULATION WITH ACETYL TETRAPEPTIDE-5
For Acetyl Tetrapeptide-5, successful formulation begins by identifying the exact commercial grade. If the material is supplied as pure or high-purity peptide powder, the formulator must calculate the required active concentration and prepare the material according to the manufacturer's dissolution and processing recommendations. If it is supplied as a ready-made solution, the carrier composition and active percentage must be included in the batch calculation. A commercial 0.1% peptide solution should never be dosed as though it were 100% Acetyl Tetrapeptide-5. For many ready-made cosmetic solutions, addition during the cool-down or final manufacturing stage is preferred.

This minimizes unnecessary thermal exposure. Some commercial guidance specifies incorporation below approximately 40°C, while other grades may specify slightly different limits. The supplier's current TDS should always override a generic temperature recommendation. The same principle applies to pH. Commercial Acetyl Tetrapeptide-5 systems are commonly used around mildly acidic to near-neutral cosmetic pH ranges, but the acceptable range depends on the supplied grade and complete formulation. N-acetyl-β-alanyl-L-histidyl-L-seryl-L-histidine should not be subjected unnecessarily to strongly acidic, strongly alkaline or prolonged high-temperature conditions without supporting stability data.

Compatibility testing should include:
Appearance
Color
Odor
pH
Viscosity
Centrifugation behavior where appropriate
Freeze-thaw stability where relevant
Elevated-temperature stability
Room-temperature stability
Light exposure where relevant
Packaging compatibility
Microbiological challenge testing for water-containing products
Active stability where analytical testing is available
Eye-area sensory assessment
Finished-product safety assessment
A successful laboratory batch should not be assumed to remain stable after scale-up without verification.

PURE ACETYL TETRAPEPTIDE-5 VS ACETYL TETRAPEPTIDE-5 SOLUTION
For Acetyl Tetrapeptide-5, this distinction is fundamental for technical purchasing. High-purity Acetyl Tetrapeptide-5 powder may have a peptide purity specification above 95%, 98% or 99%, depending on supplier and intended grade. A commercial cosmetic peptide solution may contain only 0.1% active peptide. The remaining material can consist of water, glycerin, butylene glycol or another carrier. These products can therefore differ by approximately three orders of magnitude in nominal peptide concentration. Consider two quotations.

Supplier A offers 1 kg of 98% peptide powder. Supplier B offers 1 kg of a 0.1% peptide solution. Comparing only the kilogram price would be meaningless. One kilogram of a 0.1% solution contains approximately 1 gram of active peptide. One kilogram of 98% powder theoretically contains approximately 980 grams of peptide before other specification considerations. However, this does not automatically mean the powder is the better choice.

The diluted cosmetic solution may provide easier handling, simpler dosing, validated carrier compatibility, established formulation guidance and reduced risk of weighing extremely small peptide quantities. The correct choice depends on production scale, formulation capability, documentation, cost-in-use and quality requirements. A manufacturer producing large volumes may prefer a concentrated raw material if its dosing and quality systems can manage it accurately.

A small or medium cosmetic manufacturer may find a standardized solution easier to incorporate reproducibly. Therefore, “Acetyl Tetrapeptide-5 price per kilogram” is not a technically sufficient purchasing metric. Cost per gram of active peptide and cost per kilogram of finished cosmetic at the intended dosage are more informative.

TYPICAL USE LEVEL OF ACETYL TETRAPEPTIDE-5
For Acetyl Tetrapeptide-5, there is no single universal use percentage applicable to every commercial form. Ready-made cosmetic solutions containing approximately 0.1% active peptide are commonly recommended at around 1–10% of the finished formulation. That recommendation applies to the diluted solution, not to pure peptide.

For a 0.1% solution:
1% solution in the finished product provides approximately 0.001% active peptide. 3% solution provides approximately 0.003% active peptide. 5% solution provides approximately 0.005% active peptide. 10% solution provides approximately 0.01% active peptide. If a different supplier offers a solution containing 1% peptide, the calculation changes completely. Likewise, a high-purity powder requires a much lower addition quantity to reach the same final active level.

The required dosage should therefore be calculated from:
Target active peptide concentration
Assay or active concentration of the supplied raw material
Batch size
Supplier recommended use range
Finished-product safety and claims strategy
A formulation specification should ideally record both raw-material dosage and resulting active peptide concentration.

HOW TO ADD ACETYL TETRAPEPTIDE-5 TO A COSMETIC FORMULATION
Acetyl Tetrapeptide-5 is generally introduced through the aqueous phase or during cool-down.
For a pre-diluted water-soluble solution, a typical manufacturing sequence is:
Prepare the main water phase. Dissolve compatible humectants and water-soluble ingredients. Prepare the gel or emulsion according to the selected rheology system.

Complete any heating stage required by emulsifiers or other structural ingredients. Begin cooling. When the batch reaches the maximum temperature permitted for N-acetyl-β-alanyl-L-histidyl-L-seryl-L-histidine grade, add Acetyl Tetrapeptide-5 solution. Mix gently but sufficiently to ensure uniform distribution. Add other temperature-sensitive ingredients according to their requirements. Adjust final pH.

Complete final weight adjustment. Check appearance, pH and viscosity. Proceed with microbiological and stability controls. Excessive shear after peptide addition is not necessarily useful. Mixing should be sufficient for homogeneity without subjecting the finished system to unnecessary processing. For pure powder, the supplier's dissolution instructions should be followed. Pre-dissolution in a suitable aqueous medium may provide better distribution than direct addition of a very small powder quantity into a large batch. Accurate weighing is essential because the required active quantity can be small.

ACETYL TETRAPEPTIDE-5 AND FORMULATION TEMPERATURE
For Acetyl Tetrapeptide-5, peptides are generally more sensitive to harsh processing than simple inorganic raw materials. For this reason, Acetyl Tetrapeptide-5 is commonly treated as a cool-down active. Commercial solution guidance may recommend addition below approximately 40°C. The exact limit should be confirmed for the purchased grade. If an emulsion requires heating to 70–80°C, there is normally no technical reason to expose N-acetyl-β-alanyl-L-histidyl-L-seryl-L-histidine to that entire thermal cycle when it can be added after cooling.

Cool-down incorporation offers several advantages:
Reduced thermal stress
Lower risk of peptide degradation
Better protection of other temperature-sensitive actives
Simpler control of final active concentration
Compatibility with conventional hot-process emulsions
This does not mean that brief exposure above a particular temperature automatically destroys the molecule. Stability is a function of temperature, time, pH, water activity and formulation environment. Nevertheless, avoiding unnecessary thermal exposure is a rational formulation principle.

ACETYL TETRAPEPTIDE-5 AND pH
Peptide stability can be influenced by pH. Commercial Acetyl Tetrapeptide-5 solutions may themselves have mildly acidic pH specifications. Many cosmetic formulations containing N-acetyl-β-alanyl-L-histidyl-L-seryl-L-histidine are designed in a mildly acidic to near-neutral region. A formulation range around approximately pH 5–7 is often practical for skin care, but the supplier's grade-specific recommendations should be used.

The final pH must also satisfy the requirements of:
Preservative system
Rheology modifier
Other peptides
Niacinamide
Hyaluronic acid
Botanical extracts
Chelating agents
Emulsion system
Packaging compatibility
Skin-area suitability
The peptide should therefore not be evaluated in isolation. A formula containing Acetyl Tetrapeptide-5, for example, may theoretically tolerate a certain pH while the preservative requires another range. The final operating window is the overlap between all relevant ingredients.

COMPATIBILITY WITH HYALURONIC ACID
Acetyl Tetrapeptide-5 and hyaluronic acid are complementary rather than competing technologies. Hyaluronic acid and sodium hyaluronate are primarily used for hydration, film formation and skin-feel benefits. Acetyl Tetrapeptide-5 provides a more specialized peptide positioning for the eye contour. A combination can therefore be useful in eye serums and hydrogels.

A typical concept may include low- or medium-viscosity sodium hyaluronate for hydration together with Acetyl Tetrapeptide-5 solution added during cool-down. The formulator should monitor viscosity because hyaluronic acid can significantly influence rheology even at low concentrations. Preservation also requires attention because both ingredients are generally incorporated into water-rich systems.

COMPATIBILITY WITH CAFFEINE
For Acetyl Tetrapeptide-5, caffeine is one of the most recognizable ingredients in eye-care cosmetics. Combining caffeine with Acetyl Tetrapeptide-5 allows a manufacturer to create a formula with both a familiar consumer-facing ingredient and a specialized peptide active. The two materials should not be treated as chemical substitutes. Caffeine is a small xanthine molecule with very different molecular properties. Acetyl Tetrapeptide-5 is a short peptide.

Their solubility, use level, cost and technical positioning differ substantially. In a morning eye gel, the combination can be commercially coherent. Caffeine concentration must be selected according to its own solubility and formulation requirements rather than copied from the peptide dosage.

COMPATIBILITY WITH NIACINAMIDE
For Acetyl Tetrapeptide-5, niacinamide is a broad multifunctional cosmetic active with established use in facial care. It can support barrier-related, tone-related and general skin-conditioning positioning. Acetyl Tetrapeptide-5 is much more specialized toward peptide eye care. Combining them can create a multifunctional eye serum or facial serum. The pH should be chosen to suit the entire formulation, and the total active load should be evaluated for sensory quality and tolerance around the eye. Because niacinamide is relatively cost-efficient compared with specialty peptides, the combination can also provide a useful commercial balance between broad efficacy positioning and premium peptide differentiation.

COMPATIBILITY WITH OTHER PEPTIDES
For Acetyl Tetrapeptide-5, multi-peptide cosmetics are increasingly common. Acetyl Tetrapeptide-5 may be combined with other cosmetic peptides when their carrier systems, pH ranges and processing requirements are compatible. Potential categories include signal peptides, palmitoylated peptides, copper peptides and other specialty tetrapeptides or oligopeptides. However, combining several peptides simply to increase the number appearing on an ingredient list is not good formulation practice. Each peptide should have a clear technical role.

The combined system should be evaluated for:
pH compatibility
Carrier compatibility
Electrolyte load
Preservation
Color stability
Metal-ion interactions where relevant
Rheology
Packaging
Cost-in-use
Claims substantiation
A multi-peptide formula should be designed as a coherent system rather than a collection of marketing names.

INITIAL FORMULATION APPROACHES FOR ACETYL TETRAPEPTIDE-5
For Acetyl Tetrapeptide-5, the formulations below are starting concepts for laboratory development. They are not validated commercial formulas, regulatory approvals or finished-product manufacturing instructions. The exact Acetyl Tetrapeptide-5 dosage depends on the concentration of the supplied raw material. Where “Acetyl Tetrapeptide-5 solution” is stated, the supplier's recommended use level and active concentration must be checked before calculation.

EXAMPLE 1: ACETYL TETRAPEPTIDE-5 HYDRATING EYE SERUM
Purpose: Lightweight eye serum for hydration and the appearance of puffiness.

Starting concept:
Purified Water: q.s. to 100%
Glycerin: 3.00%
Propanediol: 3.00%
Betaine: 1.00%
Panthenol: 0.50%
Sodium Hyaluronate: 0.10%
Acetyl Tetrapeptide-5 Solution: 1.00–10.00%, depending on supplier grade and recommendation
Chelating Agent: according to supplier recommendation
Rheology Modifier: q.s. for desired serum viscosity
Preservative System: q.s. according to supplier recommendation and challenge testing
pH Adjuster: q.s.

Target pH: approximately 5.5–6.5, subject to compatibility testing
Process approach: 
Prepare the purified water phase. Add the chelating agent and dissolve completely.
Add glycerin, propanediol and betaine. Pre-disperse the selected rheology modifier where necessary.
Hydrate sodium hyaluronate using the appropriate process. Add panthenol. Adjust the preliminary pH if required.

Cool the batch to the temperature recommended for N-acetyl-β-alanyl-L-histidyl-L-seryl-L-histidine. Add the Acetyl Tetrapeptide-5 solution during the final stage. Add preservative according to its processing requirements. Adjust final pH. Check viscosity and appearance after full equilibration. This formula can be developed into a pump serum, airless eye serum or light gel depending on the selected rheology system.

EXAMPLE 2: CAFFEINE AND ACETYL TETRAPEPTIDE-5 EYE GEL
Purpose: Morning eye gel targeting the appearance of tired and puffy under-eyes.

Purified Water: q.s. to 100%
Glycerin: 3.00%
Propanediol: 3.00%
Caffeine: formulation-dependent level within its validated solubility range
Panthenol: 0.50%
Sodium Hyaluronate: 0.05–0.15%
Acetyl Tetrapeptide-5 Solution: supplier-recommended level
Gel Polymer: q.s. Chelating Agent: q.s.

Preservative: q.s. pH Adjuster: q.s. The caffeine should be completely dissolved using conditions appropriate for the selected concentration. The peptide should be added after any significant heating stage. The gel should remain smooth, homogeneous and free from crystallization during stability testing. A transparent or translucent gel can provide a strong visual match with the technical positioning of the formula.

EXAMPLE 3: MULTI-PEPTIDE EYE CREAM
Purpose: Richer anti-aging eye cream combining peptide technology with moisturization and emolliency.

Water Phase:
Purified Water: q.s. to 100%
Glycerin: 3.00%
Propanediol: 2.00%
Betaine: 1.00%
Oil Phase:
Caprylic/Capric Triglyceride: 3.00%
Light Cosmetic Ester: 2.00%
Emulsifier: supplier-recommended level
Fatty Alcohol or Structuring Agent: as required
Cool-Down Phase:
Acetyl Tetrapeptide-5 Solution: supplier-recommended level
Additional Cosmetic Peptide: supplier-recommended level
Panthenol: 0.50%
Preservative: q.s. Chelating Agent: q.s. pH Adjuster: q.s.

The emulsion is prepared according to the emulsifier system. After homogenization, the batch is cooled. Temperature-sensitive peptides are incorporated during cool-down. The finished product should be tested for emulsion stability, viscosity drift, pH drift, odor, color and packaging compatibility. For eye-area use, fragrance-free or very low-fragrance design may be preferable depending on the target market.

EXAMPLE 4: HYDROGEL EYE PATCH ESSENCE
Purpose: Water-rich essence for hydrogel eye patch development.

Purified Water: q.s. to 100%
Glycerin: 5.00%
Propanediol: 3.00%
Betaine: 1.00%
Panthenol: 0.50%
Sodium Hyaluronate: 0.10%
Acetyl Tetrapeptide-5 Solution: supplier-recommended level
Hydrogel Polymer System: according to technology
Preservative: q.s. Chelating Agent: q.s. pH Adjuster: q.s.

Hydrogel technology varies substantially between manufacturers. Polymer selection, ionic strength, peptide carrier and preservation must therefore be tested together. N-acetyl-β-alanyl-L-histidyl-L-seryl-L-histidine should not be assumed to remain stable merely because the hydrogel looks physically stable.

EXAMPLE 5: NIACINAMIDE AND PEPTIDE EYE SERUM
Purpose: Multifunctional serum combining specialized peptide positioning with broader skin-conditioning support. Purified Water: q.s.

Niacinamide: 2.00–4.00%
Glycerin: 3.00%
Propanediol: 3.00%
Panthenol: 0.50%
Betaine: 1.00%
Sodium Hyaluronate: 0.05–0.10%
Acetyl Tetrapeptide-5 Solution: supplier-recommended level
Rheology Modifier: q.s. Preservative: q.s.

Chelating Agent: q.s. pH Adjuster: q.s. The target pH should be selected according to the combined requirements of niacinamide, peptide, preservative and rheology system. A lightweight texture is generally preferable for daytime eye application.

EXAMPLE 6: PEPTIDE FACIAL SERUM
Purpose: Full-face multi-active serum where Acetyl Tetrapeptide-5 forms part of a broader peptide strategy. Purified Water: q.s.

Glycerin: 3.00%
Propanediol: 4.00%
Betaine: 1.00%
Sodium Hyaluronate: 0.10%
Acetyl Tetrapeptide-5 Solution: supplier-recommended level
Additional Peptide Complex: supplier-recommended level
Panthenol: 0.50%
Rheology Modifier: q.s. Preservative: q.s.

Chelating Agent: q.s. pH Adjuster: q.s. This concept demonstrates that Acetyl Tetrapeptide-5 is not limited to eye creams, although eye contour care remains its strongest commercial application.

ACETYL TETRAPEPTIDE-5 VERSUS CAFFEINE
For Acetyl Tetrapeptide-5, caffeine and Acetyl Tetrapeptide-5 frequently appear in the same eye-care market but are chemically very different. Caffeine has the advantage of strong consumer recognition and relatively low cost. Acetyl Tetrapeptide-5 provides a more specialized peptide story. Caffeine can therefore be useful in mass-market and premium products alike, while Acetyl Tetrapeptide-5 can help differentiate a technically advanced eye formulation. They are not mutually exclusive. A formula containing both can be more commercially coherent than choosing one solely to replace the other.

ACETYL TETRAPEPTIDE-5 VERSUS HYALURONIC ACID
For Acetyl Tetrapeptide-5, hyaluronic acid primarily supports hydration and surface appearance. Acetyl Tetrapeptide-5 provides targeted peptide positioning. Hyaluronic acid is widely recognized and available in numerous molecular-weight grades. Acetyl Tetrapeptide-5 is generally used at much lower actual active concentrations and carries a higher specialty-active value. For an eye serum, the two ingredients can perform complementary functions. Hyaluronic acid can improve hydration and skin feel, while Acetyl Tetrapeptide-5 provides the specialized under-eye peptide component.

ACETYL TETRAPEPTIDE-5 VERSUS NIACINAMIDE
For Acetyl Tetrapeptide-5, niacinamide is broader in application and generally more cost-efficient. It can be used across facial serums, moisturizers, body products and numerous other skin care formats. Acetyl Tetrapeptide-5 is more specialized. A manufacturer choosing between them should first identify the intended claim architecture. For broad barrier and tone positioning, niacinamide may play the central role. For a premium under-eye peptide product, Acetyl Tetrapeptide-5 offers stronger category relevance. For multifunctional formulations, both can be combined.

ACETYL TETRAPEPTIDE-5 VERSUS PALMITOYL PEPTIDES
For Acetyl Tetrapeptide-5, palmitoylated peptides contain a lipid chain that modifies their physicochemical behavior. Examples in the cosmetic market include palmitoyl-containing peptides positioned around visible wrinkles, firmness and extracellular-matrix-related pathways. This acetylated tetrapeptide does not contain a palmitoyl chain. It is more strongly associated with hydrophilic formulation systems and eye-contour puffiness positioning. Therefore, choosing between Acetyl Tetrapeptide-5 and a palmitoylated peptide depends on the intended cosmetic story. They may also be combined in a multi-peptide anti-aging product if their commercial preparations are compatible.

ACETYL TETRAPEPTIDE-5 VERSUS ACETYL HEXAPEPTIDE-8 AND RELATED PEPTIDES
For Acetyl Tetrapeptide-5, acetyl Hexapeptide-8 and related expression-line peptides are positioned differently from Acetyl Tetrapeptide-5. Expression-line peptides are commonly marketed around the appearance of dynamic facial lines. The eye bag peptide is associated more strongly with the eye contour, puffiness and under-eye appearance. A premium eye serum may contain both if the formulation aims to address several visible signs around the eye. The peptides should not be described as identical alternatives simply because both belong to N-acetyl-β-alanyl-L-histidyl-L-seryl-L-histidine category.

ADVANTAGES OF ACETYL TETRAPEPTIDE-5
For Acetyl Tetrapeptide-5, one important advantage is specialized eye-care positioning. Many cosmetic ingredients are broad moisturizers or skin conditioners. Acetyl Tetrapeptide-5 has a more clearly defined commercial identity around the under-eye region. Another advantage is compatibility with water-based formulation concepts. This allows development of lightweight gels, serums and hydrogel products. N-acetyl-β-alanyl-L-histidyl-L-seryl-L-histidine can be used at low actual active concentrations, making it possible to build sophisticated formulations without adding large quantities of solid material.

It combines readily at the concept level with popular ingredients such as caffeine, hyaluronic acid, niacinamide and other peptides. Acetyl Tetrapeptide-5 can also support premium differentiation. A simple glycerin eye gel and a multi-active peptide eye serum occupy different commercial positions even if both provide moisturization.

Acetyl Tetrapeptide-5's defined molecular identity provides another advantage over poorly characterized botanical mixtures when a manufacturer wants a technically precise active story. The peptide sequence, molecular formula, molecular weight and CAS identity can be clearly specified. For R&D teams, this facilitates documentation and formulation control. For purchasing departments, however, these advantages only apply when the supplier provides adequate information about active concentration and quality.

LIMITATIONS OF ACETYL TETRAPEPTIDE-5
Acetyl Tetrapeptide-5 is not a universal solution for every under-eye concern. Structural eye bags caused predominantly by anatomy or pronounced fat protrusion cannot reasonably be expected to disappear through a topical peptide. Dark circles have multiple causes. N-acetyl-β-alanyl-L-histidyl-L-seryl-L-histidine should therefore not be marketed as though it corrects all pigmentation, vascular visibility and facial shadowing.

N-acetyl-beta-alanyl-L-histidyl-L-seryl-L-histidine is not a preservative. A water-based peptide solution or finished serum still requires an appropriate preservation strategy. It is not an emulsifier. It does not create an oil-in-water cream structure by itself. N-acetyl-beta-alanyl-L-histidyl-L-seryl-L-histidine is not a primary rheology modifier. A gel or serum still needs a suitable polymer if viscosity is required.

N-acetyl-β-alanyl-L-histidyl-L-seryl-L-histidine is not an oil-soluble active in its conventional form. Anhydrous oils therefore require a different delivery strategy. Acetyl Tetrapeptide-5 is also more process-sensitive than many simple mineral or small-molecule raw materials. Heat, pH and storage conditions should be controlled. Finally, supplier efficacy information for specialty cosmetic peptides should not automatically be treated as proof that every finished product will produce identical results. Finished-product concentration, vehicle, application pattern, stability and consumer population all matter.

QUALITY CONTROL AND PURCHASING CRITERIA FOR ACETYL TETRAPEPTIDE-5
Acetyl Tetrapeptide-5 raw-material purchasing based solely on the lowest kilogram price can produce misleading comparisons.

The first question should be:

What exactly is being supplied?

A high-purity powder?

A 1% concentrate?

A 0.1% cosmetic solution?

A glycerin/water solution?

A butylene glycol/water solution?

A multi-peptide preparation?

A generic peptide preparation?
These materials cannot be compared directly without normalization.

Recommended purchasing information includes:
Product name
INCI name
CAS number
Peptide sequence
Molecular formula
Molecular weight
Physical form
Active peptide concentration
Peptide purity where applicable
Carrier composition
Preservative system where applicable
Water content where relevant
pH for liquid grades
Appearance specification
Identity test
HPLC purity or assay
Microbiological specification for cosmetic solutions where applicable
Storage conditions
Shelf life or retest period
Country of origin
Manufacturer
Batch traceability
Packaging
Minimum order quantity
Lead time
TDS
SDS
COA
Regulatory statements required for the intended market
A quotation should also specify whether the percentage refers to active peptide or supplied commercial solution. Without this information, two quotations can appear similar while representing completely different quantities of active material.

WHAT PURITY SHOULD BE SELECTED?
For Acetyl Tetrapeptide-5, the required purity depends on the intended use and product form. High-purity peptide powder may be available with HPLC purity specifications such as ≥98% or higher. A cosmetic manufacturer purchasing a ready-made solution may instead focus on verified active concentration and the quality of the complete solution. “99% purity” and “0.1% active concentration” describe different concepts. A solution can contain high-purity peptide that has subsequently been diluted to 0.1%. The final solution is not 99% peptide even though N-acetyl-β-alanyl-L-histidyl-L-seryl-L-histidine used to prepare it may have had high chromatographic purity.

Purchasing documents should therefore distinguish between:
Purity of peptide component
Assay of peptide component
Concentration of peptide in supplied solution
Total composition of commercial raw material
This distinction prevents specification errors.

CERTIFICATE OF ANALYSIS FOR ACETYL TETRAPEPTIDE-5
The COA provides batch-specific quality information.

Depending on grade, it may include:
Product name
Batch or lot number
Manufacturing date
Retest or expiry information
Appearance
Identification
Peptide purity
Assay
Water content
pH for solution grades
Microbiological results where applicable
Other supplier-defined quality parameters
The COA should correspond to the actual lot being delivered. A generic specification is not a substitute for batch-specific analysis.

TECHNICAL DATA SHEET FOR ACETYL TETRAPEPTIDE-5
For Acetyl Tetrapeptide-5, the TDS normally describes the product rather than reporting individual batch results.

Useful information may include:
INCI name
CAS number
Product description
Physical form
Active concentration
Carrier composition
Solubility
Recommended use level
Recommended processing temperature
Recommended pH range
Applications
Storage conditions
Shelf life
The TDS is particularly important for formulators because it can reveal whether a product described commercially as Acetyl Tetrapeptide-5 is actually a diluted peptide solution.

SAFETY DATA SHEET FOR ACETYL TETRAPEPTIDE-5
For Acetyl Tetrapeptide-5, the SDS provides information relevant to occupational handling, storage, accidental release, first aid, transport and other safety considerations. An SDS for Acetyl Tetrapeptide-5 powder should not automatically be assumed to apply to an Acetyl Tetrapeptide-5 peptide solution in glycerin/water. Physical form and carrier composition affect handling. The current SDS supplied for the exact commercial grade should therefore be used.

STORAGE OF ACETYL TETRAPEPTIDE-5
For Acetyl Tetrapeptide-5, storage requirements depend strongly on product form. High-purity peptide powders used for laboratory or specialty applications may require frozen storage, including conditions around -20°C for certain products. Commercial cosmetic peptide solutions can have completely different requirements. Some stabilized preparations supplied as Acetyl Tetrapeptide-5 solution can be stored in original sealed containers in a clean, cool and dark place without refrigeration.

Other preparations may have different instructions. This is why generic statements such as “Acetyl Tetrapeptide-5 must always be refrigerated” are not technically reliable. The supplier's current storage specification should be followed. General good practice includes: Keep containers properly closed. Protect the material from contamination. Avoid unnecessary exposure to heat. Protect from direct light where specified. Use clean equipment during dispensing. Prevent repeated uncontrolled temperature cycling.

Record opening dates where required by the quality system. Follow the stated shelf life or retest period. For liquid cosmetic solutions, microbiological contamination after opening can be particularly important. For powder, moisture exposure can affect handling and potentially stability.

PACKAGING CONSIDERATIONS
For Acetyl Tetrapeptide-5, peptide packaging should protect the product throughout storage and handling. High-purity powder may be supplied in small sealed bottles or specialized containers because relatively small quantities are required. Commercial cosmetic solutions may be supplied in bottles, jerrycans or other suitable containers depending on volume. For production environments, packaging size should be matched to batch consumption where possible. Repeatedly opening a large container to remove small quantities can increase contamination risk.

The compatibility of the raw material with packaging should be established by the supplier. Finished products containing the peptide can use airless pumps, conventional pumps, tubes, roll-ons or patch packaging depending on formulation design. Packaging selection should be included in stability testing rather than evaluated only after the bulk formula has been finalized.

SAFETY AND HANDLING
Acetyl Tetrapeptide-5 should be handled according to the current SDS for the supplied grade. Good industrial hygiene practices remain appropriate even for cosmetic raw materials. Avoid unnecessary inhalation of peptide powder. Avoid contact with eyes during raw-material handling. Use appropriate gloves and protective equipment according to the SDS and workplace risk assessment. Control dust when handling powder.

Keep raw materials in identified containers. Prevent cross-contamination. Use calibrated weighing equipment. Clean production equipment according to validated procedures. The fact that Acetyl Tetrapeptide-5 is intended for cosmetic use does not mean concentrated raw material should be treated as a finished cosmetic. A commercial peptide solution is a formulation ingredient and should be incorporated at the intended dosage. It should not be assumed to be suitable for injection or pharmaceutical administration. Finished eye-area products require appropriate cosmetic safety assessment.

REGULATORY POSITION OF ACETYL TETRAPEPTIDE-5
Acetyl Tetrapeptide-5 is used as an INCI cosmetic ingredient. However, the presence of an ingredient in cosmetic nomenclature does not automatically mean every formulation, concentration and marketing claim is permitted in every country.

The responsible company must evaluate:
Applicable cosmetic regulations
Ingredient restrictions
Finished-product safety
Product category
Claims
Labeling
Notification requirements
Market-specific documentation
Good manufacturing practice
Microbiological safety
Stability
For European cosmetic products, compliance with the applicable EU cosmetic regulatory framework and finished-product safety assessment remains necessary. Claims such as “reduces the appearance of puffiness” belong to a different regulatory context from claims implying treatment of edema or vascular disease. Marketing departments should therefore maintain cosmetic language. The technical mechanism can be discussed in scientific documentation without converting the finished product into an implied medicine.

PROCESS SUITABILITY
Acetyl Tetrapeptide-5 is particularly suitable for processes where temperature-sensitive actives can be added during cool-down.

Suitable formulation types include:
Cold-process serums
Cold-process gels
Hot-process emulsions with cool-down active addition
Hydrogel essences
Eye masks
Light lotions
Water-based concentrates
Multi-peptide serums
It is less straightforward in completely anhydrous oil formulations because of its hydrophilic character. For an anhydrous product, the formulator would need an appropriate delivery system or specially prepared commercial grade rather than simply dispersing conventional water-soluble peptide powder in oil.

The peptide can be integrated into industrial cosmetic production provided the manufacturer has adequate control of:
Water quality
Batch temperature
pH
Weighing accuracy
Mixing
Preservation
Microbiology
Raw-material traceability
Finished-product stability

SCALE-UP CONSIDERATIONS
For Acetyl Tetrapeptide-5, a laboratory batch can behave differently from a production batch. At larger scale, cooling takes longer. Mixing geometry changes. Addition times increase. Local concentration gradients can occur. A peptide added to a 500 kg or 5,000 kg batch may therefore experience different conditions from a 1 kg laboratory trial.

Scale-up planning should define:
Maximum temperature at peptide addition
Mixing speed
Addition point
Mixing time after addition
pH before and after addition
Order of addition
Hold time before filling
Sampling procedure
Homogeneity verification
For low-dose high-purity peptide, weighing and transfer losses can become significant. Using a validated pre-solution can improve dosing accuracy where appropriate.

BATCH CALCULATION EXAMPLE
For Acetyl Tetrapeptide-5, consider a 1,000 kg eye serum. The selected commercial Acetyl Tetrapeptide-5 solution contains 0.1% active peptide. The formulation uses the solution at 5%.

Required commercial solution:
1,000 kg × 5% = 50 kg.

Active peptide contained in the 50 kg solution:
50 kg × 0.1% = 0.05 kg. 0.05 kg equals 50 grams. Therefore, the 1,000 kg finished batch contains approximately 50 grams of active Acetyl Tetrapeptide-5.

Final active concentration:
50 g / 1,000 kg = 0.005%. This calculation illustrates why purchasing and formulation teams must distinguish solution percentage from active peptide percentage.

COST-IN-USE CALCULATION
For Acetyl Tetrapeptide-5, assume Supplier A offers a 0.1% solution at one price and Supplier B offers a more concentrated solution at a higher price per kilogram. The cheaper price per kilogram does not automatically produce the cheaper formulation.

Calculate:
Raw-material price per kilogram
Active peptide concentration
Required dosage in finished product
Cost of peptide raw material per kilogram of finished cosmetic
Packaging and logistics
Potential formulation adjustments
Minimum order quantity
Shelf life
Waste
Only after these factors are normalized can the commercial offers be compared meaningfully. This method is particularly important for peptides because dilution levels can vary substantially.

COMMON FORMULATION MISTAKES
For Acetyl Tetrapeptide-5, one common mistake is confusing commercial solution percentage with pure peptide percentage. Another is exposing N-acetyl-β-alanyl-L-histidyl-L-seryl-L-histidine unnecessarily to the complete hot-processing cycle. A third is copying a dosage from another supplier without checking active concentration.

Other errors include:
Ignoring the carrier composition. Failing to adjust the water balance when a large amount of peptide solution is used. Assuming N-acetyl-β-alanyl-L-histidyl-L-seryl-L-histidine preserves the product. Adding several peptides without checking carrier compatibility. Using strongly acidic or alkaline conditions without stability data.

Ignoring microbial risk in water-rich eye formulations. Selecting packaging before stability testing. Making pharmaceutical claims from cosmetic mechanism descriptions. Assuming every dark circle has the same cause. Comparing quotations only by kilogram price. Using an old TDS for a newly supplied grade. Failing to retain batch COAs. Avoiding these mistakes improves both formulation quality and purchasing accuracy.

BENEFITS TO THE COSMETIC MANUFACTURER
Acetyl Tetrapeptide-5 gives manufacturers a specialized active for premium eye-care development. Its low active dosage allows it to be incorporated without substantially increasing solid content. Water compatibility supports modern serum and gel textures. The ingredient can be combined with established actives, allowing a single product to address multiple consumer expectations. A peptide-based eye serum also provides strong differentiation from a basic moisturizer.

For private-label manufacturers, Acetyl Tetrapeptide-5 can support multiple product concepts using the same core active:
Morning depuffing serum
Cooling eye gel
Anti-aging eye cream
Hydrogel eye patch
Multi-peptide facial serum
Professional eye treatment
This versatility can simplify portfolio development while allowing different textures and supporting actives to distinguish individual SKUs.

BENEFITS TO THE END USER
For Acetyl Tetrapeptide-5, for the end user, Acetyl Tetrapeptide-5 is most relevant in products designed to improve the visible condition of the eye contour.

Potential cosmetic benefits include support for:
A less puffy-looking under-eye area
A smoother-looking eye contour
Improved hydration
Reduced appearance of tiredness
Improved appearance of fine dehydration lines when used in an effective moisturizing system
A more refreshed eye-area appearance
The final consumer experience depends on the complete formulation. Cooling sensory properties, spreadability, absorption, tack, compatibility with makeup and packaging can influence satisfaction as much as the active ingredient itself.

HOW TO SELECT THE RIGHT ACETYL TETRAPEPTIDE-5 GRADE
For Acetyl Tetrapeptide-5, start with the intended application. For a conventional cosmetic manufacturer, a standardized cosmetic solution may provide the easiest processing route. For specialized manufacturing with accurate micro-dosing capability, high-purity powder may offer greater formulation flexibility.

Then evaluate:
Target active concentration
Production batch size
Dosing accuracy
Carrier compatibility
Preservation
Storage facilities
Documentation
MOQ
Lead time
Cost-in-use
Regulatory requirements
If the existing formula already contains substantial glycerin, a glycerin-based peptide solution may affect sensory properties at high addition rates. A butylene-glycol-containing grade will affect the formulation differently. Carrier composition is therefore a formulation parameter, not merely an inactive detail.

ACETYL TETRAPEPTIDE-5 SUPPLIER SELECTION
For Acetyl Tetrapeptide-5, a reliable supplier should be able to clearly identify what is being sold. The quotation should not leave uncertainty about whether the product is pure peptide or diluted solution.

Useful supplier information includes:
Exact product designation
INCI
CAS
Peptide content
Carrier
Purity or assay
Manufacturer
Origin
Packaging
MOQ
Lead time
Storage
Shelf life
TDS
SDS
COA availability
A technical distributor can add value by helping the buyer match the offered grade to the intended application rather than treating all Acetyl Tetrapeptide-5 products as identical commodities.

ACETYL TETRAPEPTIDE-5 WHOLESALE AND BULK PURCHASING
For Acetyl Tetrapeptide-5, bulk buyers should evaluate concentration before negotiating only on unit price. For a diluted cosmetic solution, transportation and storage involve the carrier as well as N-acetyl-β-alanyl-L-histidyl-L-seryl-L-histidine. A concentrated grade may therefore provide different logistics economics. However, more concentrated material may require more precise dosing.

Large-volume buyers should consider:
Annual consumption
Batch size
Forecast reliability
Lead time
Safety stock
Storage temperature
Shelf life
Packaging size
Supplier change qualification
Batch-to-batch consistency
Documentation requirements
The optimal product is the grade that provides the required finished-product performance with reliable quality and commercially acceptable total cost.

ACETYL TETRAPEPTIDE-5 PRICE
For Acetyl Tetrapeptide-5, there is no meaningful permanent global price for Acetyl Tetrapeptide-5.

Price depends on:
Peptide concentration
Purity
Commercial form
Carrier
Manufacturer
Origin
Order quantity
Packaging
Documentation
Distribution channel
Shipping conditions
MOQ
Market conditions
A price request should therefore specify the required grade. “Price for Acetyl Tetrapeptide-5” without concentration information can result in quotations for technically incomparable products. For purchasing purposes, cost-in-use should be calculated whenever different concentrations are being compared.

ACETYL TETRAPEPTIDE-5 FOR PRIVATE-LABEL COSMETICS
For Acetyl Tetrapeptide-5, private-label manufacturers can use Acetyl Tetrapeptide-5 to create differentiated eye-care products for several brand positions. A minimalist brand may combine N-acetyl-β-alanyl-L-histidyl-L-seryl-L-histidine with hyaluronic acid and panthenol. A premium anti-aging brand may use a multi-peptide system. A morning eye-care product may combine the peptide with caffeine. 

A mature-skin product may use a richer emulsion with ceramides and emollients. A trend-focused brand may use hydrogel patches. The raw material can therefore support different commercial stories without changing its fundamental molecular identity. Finished-product claims should still reflect the evidence generated for the final formula.

ACETYL TETRAPEPTIDE-5 FOR SENSITIVE-SKIN FORMULATION CONCEPTS
For Acetyl Tetrapeptide-5, the eye area is naturally sensitive, making formulation simplicity valuable. A peptide formula intended for sensitive skin can minimize unnecessary fragrance and aggressive surfactants.

The supporting system may focus on:
Glycerin
Betaine
Panthenol
Hyaluronic acid
Mild emollients
Barrier-supporting ingredients
A suitable preservation system
Acetyl Tetrapeptide-5
However, “sensitive skin” is a finished-product claim and cannot be guaranteed solely from the presence of the peptide. Appropriate testing remains necessary.

CAN ACETYL TETRAPEPTIDE-5 BE USED WITH RETINOL?
Acetyl Tetrapeptide-5 may be possible to formulate both technologies in the same product, but their formulation requirements differ. Retinol is lipophilic and sensitive to oxidation and light. Acetyl Tetrapeptide-5 is hydrophilic. An emulsion can theoretically accommodate both, but stability, packaging and processing become more demanding. For some product strategies, separating them into different routine steps may be simpler. If they are combined, finished-product stability must be demonstrated rather than assumed.

CAN ACETYL TETRAPEPTIDE-5 BE USED WITH VITAMIN C?
For Acetyl Tetrapeptide-5, the answer depends strongly on which form of vitamin C is used. Pure L-ascorbic acid is commonly formulated at relatively low pH, which may not provide the most convenient environment for every peptide system. Vitamin C derivatives can have different pH requirements. Therefore, “vitamin C compatibility” cannot be answered without identifying the actual vitamin C ingredient. A formulator should evaluate the overlap between N-acetyl-β-alanyl-L-histidyl-L-seryl-L-histidine's recommended conditions and those of the selected ascorbic acid derivative.

CAN ACETYL TETRAPEPTIDE-5 BE USED WITH CERAMIDES?
For Acetyl Tetrapeptide-5, yes, conceptually these ingredients perform complementary functions. Ceramides are lipid components associated with barrier-focused formulations. Acetyl Tetrapeptide-5 is a hydrophilic peptide active. An emulsion can contain a ceramide system in the lipid phase or specialized dispersion and Acetyl Tetrapeptide-5 in the aqueous/cool-down phase. The combination can be attractive for mature or dry eye-area products.

CAN ACETYL TETRAPEPTIDE-5 BE USED IN ANHYDROUS PRODUCTS?
Acetyl Tetrapeptide-5 is hydrophilic, so direct incorporation into a completely oil-based system is not normally the simplest approach. An anhydrous formulation would require an appropriate delivery form, dispersion technology or specialized supplier preparation. A water-containing serum, gel or emulsion is generally more straightforward. This should be considered during early product design rather than attempting to force a water-soluble peptide into an unsuitable vehicle.

PRESERVATIVE COMPATIBILITY
Acetyl Tetrapeptide-5 is not a preservation system. Any water-containing finished cosmetic must be protected by an appropriate preservative strategy unless another validated preservation technology is used.

The preservative must be compatible with:
Final pH
Peptide solution
Humectants
Polymers
Packaging
Other active ingredients
The product category
Eye-area application
Preservation should be validated through appropriate microbiological testing. A raw-material solution may itself be preserved or may rely on a high concentration of a carrier such as glycol. This does not automatically preserve the final formulation after dilution.

MICROBIOLOGICAL CONSIDERATIONS
For Acetyl Tetrapeptide-5, eye-area cosmetics require careful microbiological control. Water-based peptide serums can provide an environment in which contamination becomes relevant if preservation and manufacturing hygiene are inadequate.

Good manufacturing practice should include:
Controlled process water
Clean equipment
Raw-material microbiological control where appropriate
Validated preservative system
Controlled filling
Suitable packaging
Finished-product microbiological specifications
Challenge testing where required
A peptide does not compensate for poor manufacturing hygiene.

STABILITY TESTING
For Acetyl Tetrapeptide-5, a formulation containing Acetyl Tetrapeptide-5 should undergo a stability program appropriate to the product.

Typical evaluations can include:
Room-temperature storage
Elevated-temperature storage
Low-temperature storage
Freeze-thaw cycles where relevant
Centrifugation
Light exposure where relevant
Packaging compatibility
pH monitoring
Viscosity monitoring
Color
Odor
Phase separation
Precipitation
Microbiological testing
If analytical capability is available, peptide content over time provides stronger evidence of chemical stability than appearance alone. A serum can remain visually clear while an active ingredient gradually degrades. Therefore, physical stability and chemical active stability are different concepts.

CLAIM DEVELOPMENT
For Acetyl Tetrapeptide-5, claims should be built around the intended cosmetic benefit and supporting evidence.
Appropriate cosmetic language can include concepts such as:
Helps reduce the appearance of under-eye puffiness. Supports a smoother-looking eye contour.
Helps improve the appearance of tired-looking under-eyes. Supports skin hydration. Helps improve the appearance of the eye area.

Claims implying medical treatment should be avoided unless the product belongs to an appropriate regulated category and has the required evidence. The final product has its own concentration, vehicle and use pattern. Finished-product testing provides stronger substantiation for brand-specific claims.

WHY FINISHED-PRODUCT TESTING MATTERS
For Acetyl Tetrapeptide-5, a raw-material study evaluates a particular test material under defined conditions. A commercial eye cream may contain different concentrations and supporting ingredients. Its penetration, spread, stability and consumer use can differ. For this reason, a manufacturer seeking strong performance claims should consider finished-product testing.

Depending on the intended claim, methods can include instrumental measurements, imaging, expert grading and consumer perception studies. The study design should match the claim. This approach also helps distinguish genuine formulation performance from ingredient-list marketing.

TECHNICAL VALUE FOR R&D
For Acetyl Tetrapeptide-5, for an R&D formulator, this eye contour peptide offers a defined molecule with a clear application niche. It is compatible with modern water-rich skin care formats. It can be introduced late in the manufacturing process. It works conceptually with many common eye-care actives.

Its low active concentration means it does not usually dominate formulation rheology. These characteristics make it relatively flexible compared with actives that require high oil phases, extreme pH or specialized solubilization. The main R&D challenges are accurate dosage calculation, temperature management, pH compatibility, preservation and verification of the exact commercial grade.

TECHNICAL VALUE FOR PURCHASING
For Acetyl Tetrapeptide-5, for purchasing teams, Acetyl Tetrapeptide-5 illustrates why active ingredients should not be sourced by name alone.

The buyer needs to know:

What concentration is offered?

Is it powder or solution?

What is the carrier?

What is the peptide purity?

What is the actual assay?

Which documents are available?

What storage is required?

What is the shelf life?

What is the MOQ?

What is the lead time?

What is the cost per active gram?

What is the cost-in-use?

Can the supplier provide batch traceability?
Answering these questions before price comparison reduces the risk of purchasing a technically unsuitable grade.

SUPPLIER CHANGE MANAGEMENT
For Acetyl Tetrapeptide-5, changing Acetyl Tetrapeptide-5 supplier should be treated as a raw-material change rather than an administrative purchasing change.

Compare:
INCI composition
Peptide concentration
Purity
Carrier
Preservative
pH
Appearance
Density where relevant
Recommended dosage
Processing temperature
Storage
Microbiology
Documentation
Even if both suppliers list CAS 820959-17-9, their commercial solutions may not be identical. A supplier change may affect viscosity, sensory profile, preservative load or active concentration. Pilot testing and stability verification are therefore appropriate.

RECEIVING INSPECTION
When Acetyl Tetrapeptide-5 arrives at the manufacturing site, receiving control can include:
Container integrity
Label verification
Product name
Batch number
Quantity
COA matching
Appearance
Storage condition during transport where relevant
Expiry or retest date
Manufacturer information
Internal material code
Any deviation should be resolved before release to production. High-value peptide ingredients benefit from strong traceability because relatively small quantities can influence many finished batches.

WHAT SHOULD BE CONSIDERED WHEN PURCHASING ACETYL TETRAPEPTIDE-5?
For Acetyl Tetrapeptide-5, the first question should be the intended application. An eye gel manufacturer and a research laboratory may require different product forms.

A cosmetic manufacturer should define:
Final product type
Target active concentration
Preferred carrier
Batch size
Required documentation
Storage capability
Desired quality grade
Regulatory market
Packaging preference
Annual quantity
If replacing an existing material, the current TDS and COA can be shared for comparison. This allows a supplier or distributor to evaluate technical equivalence more accurately.

ACETYL TETRAPEPTIDE-5 SUPPLY FROM ATAMAN KIMYA
For Acetyl Tetrapeptide-5, companies evaluating Acetyl Tetrapeptide-5 for eye creams, eye serums, hydrogel patches, multi-peptide cosmetics or other skin care formulations can define their technical requirements before requesting a commercial offer from Ataman Kimya. Providing the intended application is particularly useful because “Acetyl Tetrapeptide-5” alone does not establish whether the required material should be a high-purity peptide or a pre-diluted cosmetic solution.

A technical inquiry can include:
Intended application
Required INCI
Required active concentration
Preferred physical form
Preferred carrier where relevant
Required purity
Estimated annual consumption
Initial order quantity
Packaging preference
Required TDS
Required SDS
Required COA
Target market
Existing material specification if a replacement is being evaluated
The current product form, manufacturer, origin, active concentration, packaging, availability, lead time and documentation should be confirmed for the specific grade offered at the time of inquiry. This approach allows purchasing decisions to be based on formulation suitability and verified specifications rather than product name alone.

FREQUENTLY ASKED QUESTIONS ABOUT ACETYL TETRAPEPTIDE-5

What is Acetyl Tetrapeptide-5?
Acetyl Tetrapeptide-5 is a synthetic acetylated tetrapeptide used primarily as a cosmetic active in eye contour and advanced skin care formulations. Its peptide representation is Ac-βAla-His-Ser-His-OH.

What is the CAS number of Acetyl Tetrapeptide-5?
The CAS number is 820959-17-9.

What is the molecular formula of Acetyl Tetrapeptide-5?
Its molecular formula is C20H28N8O7.

What is the molecular weight of Acetyl Tetrapeptide-5?
Its molecular weight is approximately 492.49 g/mol.

What is the INCI name?
The INCI name is ACETYL TETRAPEPTIDE-5.

What is the EINECS number of Acetyl Tetrapeptide-5?
A specific verified EINECS number should not be assigned unless it is supported by the relevant regulatory record. Major ingredient records commonly list the CAS and cosmetic identity without providing a specific EINECS/ELINCS number for this peptide.

What is the peptide sequence?
It is commonly represented as Ac-βAla-His-Ser-His-OH.

What is the chemical name?
A commonly used chemical description is N-acetyl-beta-alanyl-L-histidyl-L-seryl-L-histidine.

What is Acetyl Tetrapeptide-5 used for?
It is primarily used in cosmetic products targeting the appearance of under-eye puffiness, eye bags, tired-looking eye contours and related signs of aging.

Is Acetyl Tetrapeptide-5 used for eye bags?
Yes. Eye-bag and under-eye-puffiness formulations are its best-known cosmetic application.

Can Acetyl Tetrapeptide-5 permanently remove eye bags?
No topical cosmetic ingredient should be expected to permanently remove all forms of eye bags. Structural or anatomical eye bags differ from temporary cosmetic puffiness.

Is Acetyl Tetrapeptide-5 used for dark circles?
It can be included in products addressing the overall appearance of the eye contour and under-eye darkness, but dark circles have multiple causes. No single peptide addresses every cause.

Is Acetyl Tetrapeptide-5 water soluble?
It is hydrophilic and compatible with aqueous systems. Commercial peptide solutions are commonly water soluble.

Is Acetyl Tetrapeptide-5 oil soluble?
Conventional Acetyl Tetrapeptide-5 is not normally treated as an oil-soluble active. Water-containing systems are generally more straightforward.

What does Acetyl Tetrapeptide-5 look like?
High-purity material is typically supplied as a white to off-white solid or powder. Commercial diluted cosmetic grades can be clear or transparent liquids.

Can Acetyl Tetrapeptide-5 be supplied as a powder?
Yes. High-purity peptide grades can be supplied in solid form.

Can it be supplied as a solution?
Yes. Cosmetic suppliers frequently provide pre-diluted solutions for easier formulation.

Are Acetyl Tetrapeptide-5 powder and solution the same?
They contain the same active molecule but are not equivalent commercial raw materials. Their active concentration, carrier, dosage and processing requirements can differ dramatically.

What is the recommended use level?
It depends on the supplied grade. Some 0.1% commercial peptide solutions are used at approximately 1–10% of the finished formula. This does not mean pure peptide should be used at 1–10%.

How much active peptide is present when a 0.1% solution is used at 5%?
Approximately 0.005% active Acetyl Tetrapeptide-5.

How much active peptide is present when a 0.1% solution is used at 10%?
Approximately 0.01% active peptide.

Why is this calculation important?
Because commercial solution dosage and actual active concentration are frequently confused. The distinction affects formulation safety, cost and technical comparison.

When should Acetyl Tetrapeptide-5 be added?
Many cosmetic grades are best introduced during the cool-down or final stage of manufacturing.

At what temperature should Acetyl Tetrapeptide-5 be added?
Some commercial solutions recommend addition below approximately 40°C. The current TDS for the exact supplied grade should be followed.

What pH is suitable?
Mildly acidic to near-neutral cosmetic systems are commonly used, but the exact acceptable range depends on the grade and complete formulation.

Can Acetyl Tetrapeptide-5 be heated?
Unnecessary heating should generally be avoided. Peptides are commonly incorporated during cool-down to reduce thermal stress.

Can it be used in eye cream?
Yes. Eye cream is one of its principal applications.

Can it be used in eye serum?
Yes. Lightweight water-based eye serums are particularly suitable.

Can it be used in eye gel?
Yes. Its aqueous compatibility makes eye gels a logical format.

Can it be used in hydrogel eye patches?
Yes, provided the peptide is compatible with the hydrogel, preservative and processing system.

Can it be used in facial serum?
Yes. It can be included in broader multi-peptide or anti-aging facial serums.

Can Acetyl Tetrapeptide-5 be combined with caffeine?
Yes, subject to normal formulation compatibility and stability testing.

Can it be combined with hyaluronic acid?
Yes. The two ingredients provide complementary positioning.

Can it be combined with niacinamide?
Yes, provided the complete formulation has an appropriate pH and stability profile.

Can it be combined with other peptides?
Yes, but each commercial peptide preparation should be checked for carrier, pH and compatibility.

Can it be combined with ceramides?
Yes. An emulsion can combine hydrophilic peptide technology with lipid barrier ingredients.

Can it be combined with retinol?
Potentially, but formulation becomes more complex because the two ingredients have different solubility and stability requirements.

Can it be combined with vitamin C?
This depends on the vitamin C form and final pH. Low-pH pure L-ascorbic acid systems may not be the simplest environment for the peptide.

Is Acetyl Tetrapeptide-5 a moisturizer?
Its cosmetic functions can include humectant-related positioning, but it is normally selected primarily as a specialty peptide active rather than as the sole moisturizing system.

Is Acetyl Tetrapeptide-5 a preservative?
No.

Does a serum containing Acetyl Tetrapeptide-5 need preservative?
Water-containing cosmetic products require an appropriate preservation strategy unless a validated alternative preservation approach is used.

Is Acetyl Tetrapeptide-5 an emulsifier?
No.

Is it a thickener?
No. A separate rheology modifier is normally required for a gel or thick serum.

Is Acetyl Tetrapeptide-5 natural?
It is generally described as a synthetic peptide. Natural-origin calculations for commercial preparations should be based on the supplier's documentation rather than inferred from N-acetyl-β-alanyl-L-histidyl-L-seryl-L-histidine name.

Is Acetyl Tetrapeptide-5 a protein?
It is a short peptide rather than a large protein.

How many residues are in Acetyl Tetrapeptide-5?
It is a tetrapeptide, meaning its peptide structure contains four amino-acid-derived residues.

Why is it acetylated?
The N-terminal portion of the peptide is acetylated, which forms part of its defined molecular identity.

Is Acetyl Tetrapeptide-5 a palmitoyl peptide?
No. It does not contain the long palmitoyl lipid chain characteristic of palmitoylated cosmetic peptides.

What is the difference between Acetyl Tetrapeptide-5 and Palmitoyl Tetrapeptide-7?
They are different peptides with different sequences, molecular structures and cosmetic positioning. They should not be treated as direct chemical substitutes.

What is the difference between Acetyl Tetrapeptide-5 and Acetyl Hexapeptide-8?
Acetyl Hexapeptide-8 is commonly positioned for expression-line cosmetics, whereas Acetyl Tetrapeptide-5 is strongly associated with under-eye puffiness and eye contour products.

What is the difference between Acetyl Tetrapeptide-5 and caffeine?
Caffeine is a small xanthine molecule. Acetyl Tetrapeptide-5 is a peptide. Their chemistry and commercial positioning differ, although they can be combined.

What is the difference between Acetyl Tetrapeptide-5 and hyaluronic acid?
Hyaluronic acid is primarily used for hydration and rheological or film-forming effects depending on grade. Acetyl Tetrapeptide-5 is a specialty peptide used at much lower active concentrations.

What is the difference between Acetyl Tetrapeptide-5 and niacinamide?
Niacinamide is a broad multifunctional vitamin B3 derivative, while Acetyl Tetrapeptide-5 is a specialized peptide particularly associated with eye contour care.

Does Acetyl Tetrapeptide-5 treat edema?
It is a cosmetic ingredient and should not be represented as a pharmaceutical treatment for edema.

Can it be injected?
Cosmetic Acetyl Tetrapeptide-5 raw materials are intended for formulation use according to their supplied documentation, not for injection.

Is Acetyl Tetrapeptide-5 suitable for sensitive skin?
Suitability depends on the complete finished formulation and safety assessment, not on the peptide alone.

Does Acetyl Tetrapeptide-5 require refrigeration?
It depends on the commercial grade. Some high-purity peptide products require frozen storage, while some stabilized cosmetic solutions do not require refrigeration.

How should Acetyl Tetrapeptide-5 be stored?
Follow the manufacturer's instructions. In general, the material should remain properly sealed, protected from contamination and stored under the specified temperature and light conditions.

What is the shelf life?
Shelf life depends on the grade. Certain commercial solutions may have stability periods around two years under recommended storage conditions, while other products can differ.

What documents should be requested?
TDS, SDS and batch-specific COA are fundamental. Additional regulatory and quality documents may be needed depending on market and application.

What does the TDS show?
It generally provides product composition, physical properties, use level, formulation guidance, storage and application information.

What does the SDS show?
It provides safety, handling, storage, exposure and emergency information for the supplied raw material.

What does the COA show?
It reports batch-specific analytical results against the product specification.

What purity should be purchased?
The appropriate purity depends on whether the buyer needs high-purity powder or a standardized cosmetic solution. Purity and active concentration should not be confused.

What is HPLC purity?
HPLC purity describes chromatographic purity of the peptide relative to detectable related components under the specified method. It is not necessarily identical to total mass assay.

Why is peptide assay important?
It establishes how much active peptide is present and allows accurate batch calculation.

Why is carrier composition important?
A commercial peptide solution can introduce water, glycerin, butylene glycol or other components into the formula. These affect sensory properties, preservation and formulation balance.

Why is Acetyl Tetrapeptide-5 expensive compared with basic humectants?
Peptide synthesis, purification, analytical quality control and relatively specialized production contribute to a different cost structure from commodity ingredients such as glycerin.

Does the highest-purity product always provide the best cosmetic value?
Not necessarily. A standardized diluted solution may be easier to handle and dose in cosmetic manufacturing. The best grade is the one that meets the required quality, formulation and commercial criteria.

How should Acetyl Tetrapeptide-5 quotations be compared?
Normalize them according to active concentration, purity, carrier, dosage, documentation, packaging, MOQ, lead time and cost-in-use.

What information should be sent when requesting a quotation?
Provide intended application, desired grade or active concentration, quantity, packaging requirements and required documents.

Can an existing Acetyl Tetrapeptide-5 supplier be replaced directly?
Not without comparing the commercial compositions. Two products containing the same peptide can use different carriers and concentrations.

Should a replacement grade be laboratory tested?
Yes. Compatibility and stability should be verified before full production.

Which industries primarily purchase Acetyl Tetrapeptide-5?
Cosmetic manufacturers, skin care brands, contract manufacturers, private-label producers, professional cosmetic companies and cosmetic R&D organizations are the principal commercial users.

What types of finished products contain Acetyl Tetrapeptide-5?
Eye creams, eye gels, eye serums, hydrogel patches, anti-aging serums, multi-peptide treatments and specialized facial moisturizers are common examples.

Is Acetyl Tetrapeptide-5 suitable for rinse-off products?
It can theoretically be formulated where compatible, but its commercial value is generally more logical in leave-on skin care where contact time is longer.

Can it be used in makeup?
A compatible cosmetic grade can potentially be incorporated into hybrid skin care/makeup products, but stability and claims should be validated.

Can it be used in men's skin care?
Yes. The chemistry is not gender-specific. Men's eye-care products can use the same peptide technology.

Can it be used in mature-skin products?
Yes. It can be incorporated into formulations targeting multiple visible signs of aging around the eye.

Can it be used in professional cosmetics?
Yes, provided the product is formulated and marketed within the applicable cosmetic framework.

Why is Acetyl Tetrapeptide-5 popular in eye serums?
It combines specialized eye-area positioning with compatibility with lightweight water-based textures.

Does more Acetyl Tetrapeptide-5 always mean better performance?
No. Use level should follow supplier recommendations and formulation evidence. Increasing concentration beyond a validated range does not automatically increase benefit.

Can the peptide affect viscosity?
At the low active levels normally used, the peptide itself is not primarily a rheology modifier. A commercial solution used at several percent can nevertheless affect the overall solvent and humectant balance.

Does it have a strong odor?
The peptide is not used as a fragrance ingredient. Odor characteristics depend on grade and carrier.

Does it add color to a formulation?
Commercial solutions are often clear, while high-purity powder is typically white/off-white. Finished-product color should still be monitored during stability testing.

Why should Acetyl Tetrapeptide-5 be added during cool-down?
Cool-down addition minimizes unnecessary thermal exposure and is consistent with the processing guidance used for many peptide actives.

Can Acetyl Tetrapeptide-5 degrade?
Like other peptides, it can be affected by unsuitable environmental and formulation conditions. Stability depends on temperature, pH, time and formulation composition.

How is degradation detected?
Analytical methods such as chromatography provide stronger evidence than visual inspection alone.

Why is batch traceability important?
Traceability connects the finished cosmetic to the exact raw-material lot and its analytical documentation.

What is the best packaging for an Acetyl Tetrapeptide-5 eye serum?
The optimal package depends on the complete formulation. Airless pumps, conventional pumps, tubes and roll-ons can all be considered and should be evaluated through compatibility testing.

Is a jar suitable?
It may be technically possible, but repeated consumer contact and air exposure should be considered when selecting packaging for a water-based eye product.

Can Acetyl Tetrapeptide-5 be used in a roll-on eye serum?
Yes. A low-viscosity or appropriately gelled formulation can be developed for roll-on packaging.

Can it be used in an airless pump?
Yes, if the formula viscosity and packaging components are compatible.

Can it be used in a spray?
Technically possible for suitable low-viscosity formulations, although eye-area spray formats require careful product and safety design.

Can Acetyl Tetrapeptide-5 be used with glycerin?
Yes. Glycerin is commonly compatible with aqueous peptide formulations and is also used as a carrier in some commercial peptide solutions.

Can it be used with propanediol?
Propanediol can be included as a humectant and solvent in compatible cosmetic systems.

Can it be used with panthenol?
Yes. Panthenol can complement peptide eye formulations through skin-conditioning and hydration-related benefits.

Can it be used with beta-glucan?
Potentially yes, provided the complete system is stable and preserved.

Can it be used with botanical extracts?
Potentially, but botanical extracts can introduce electrolytes, color, odor and preservation challenges. Compatibility should be tested.

Can it be used with acids?
This depends on acid type, concentration and resulting pH. Strongly acidic conditions should not be assumed compatible without stability data.

Can it be used in exfoliating products?
The peptide is generally more logically used in leave-on care products with moderate pH rather than aggressive acid-peel systems.

What makes Acetyl Tetrapeptide-5 commercially valuable?
Its specialized under-eye positioning, peptide identity, low active dosage and compatibility with premium skin care formats create commercial differentiation.

What is the main technical risk when purchasing Acetyl Tetrapeptide-5?
Misunderstanding the active concentration of the offered grade is one of the most important risks.

What is the main formulation risk?
Using inappropriate processing conditions or assuming a commercial solution can be substituted one-to-one with another concentration.

What is the main marketing risk?
Overstating cosmetic evidence as medical treatment or promising correction of every type of eye bag or dark circle.

What is the main quality-control requirement?
Confirm identity, active concentration or purity and batch-specific conformity to the agreed specification.

Is Acetyl Tetrapeptide-5 suitable for vegan cosmetic concepts?
This depends on manufacturing route and supplier declarations. Vegan status should be confirmed from current supplier documentation rather than inferred from the chemical structure alone.

Is it GMO-free?
This is a supplier and manufacturing-process declaration rather than an intrinsic conclusion from the molecular name. Request the relevant statement if required.

Is Acetyl Tetrapeptide-5 halal?
Certain commercial preparations may have relevant certification, but certification applies to the specific product and supplier rather than automatically to every material sold under the same INCI name.

Can Acetyl Tetrapeptide-5 be considered an active cosmetic ingredient?
Yes. Acetyl Tetrapeptide-5 active ingredient is commonly used as a specialty cosmetic active, particularly in eye-care products.

What should an R&D engineer request before beginning formulation work?
At minimum, the current TDS, SDS, composition information, active concentration, recommended use level, processing temperature, pH guidance, storage conditions and a representative COA should be reviewed.

What should purchasing request before placing an order?
Purchasing should confirm the exact commercial grade, concentration, carrier, manufacturer, origin, packaging, MOQ, lead time, storage conditions, shelf life and required quality documents.

What should quality assurance verify?
QA should verify supplier approval, specification, batch COA, traceability, storage and any regulatory documentation required by the company's quality system.

Why should a formulation specialist know the exact peptide concentration?
Because it determines the real active level in the finished product and prevents large dosing errors.

Can a 0.1% solution be replaced with pure peptide at the same percentage?
No. This would produce a dramatically different active concentration.

Can pure peptide replace a diluted solution?
Potentially, but the formula must be recalculated and the carrier contribution, dissolution, dosing accuracy and stability must be reconsidered.

Can different Acetyl Tetrapeptide-5 solutions be substituted at equal percentages?
Only if their active concentration, carrier and technical specifications are sufficiently equivalent and the replacement has been validated.

What is the best way to calculate a replacement?
Normalize both products according to active peptide concentration, then evaluate carrier differences and formulation effects.

What information should appear in an internal raw-material specification?
Identity, INCI, CAS, physical form, concentration or assay, appearance, relevant analytical limits, storage, shelf life and required documentation should be considered.

What should be checked during stability testing?
Physical stability, pH, viscosity, odor, color, packaging, microbiology and, where feasible, active peptide stability.

Can a visually stable serum still lose peptide activity?
Yes. Chemical degradation may occur without obvious visual changes, which is why analytical testing can provide additional assurance.

Does Acetyl Tetrapeptide-5 guarantee finished-product efficacy?
No raw material can guarantee the performance of every finished formulation. Concentration, vehicle, stability and use conditions influence the final result.

Why does formulation vehicle matter?
The vehicle controls how the ingredient is distributed, remains stable and interacts with the skin surface.

Is a high peptide percentage a sign of a superior product?
Not necessarily. The percentage may refer to a diluted commercial solution rather than pure peptide, and higher dosage is not automatically better.

How should an ingredient list be interpreted?
The INCI list identifies ingredients used in the finished cosmetic but normally does not reveal the exact active peptide concentration.

Can competitor products be reverse-engineered from the INCI list alone?
Only approximately. Exact concentrations generally cannot be determined from the ingredient list, especially for low-level actives.

Why is Acetyl Tetrapeptide-5 useful for premium cosmetics?
It has a defined peptide identity, specialized eye-area application and compatibility with sophisticated multi-active formulations.

Can it also be used in affordable formulations?
Yes. Cost-in-use depends on dosage, raw-material price and total formula architecture.

What determines Acetyl Tetrapeptide-5 price?
Concentration, purity, product form, manufacturer, order quantity, packaging, origin, logistics and documentation all contribute.

Is the cheapest supplier always preferable?
No. Incorrect concentration, inadequate documentation or inconsistent quality can create costs far greater than the difference in raw-material price.

What is the most useful comparison metric?
Cost per finished batch at the required active concentration is often more useful than raw-material price per kilogram.

Why source Acetyl Tetrapeptide-5 through a technical chemical supplier?
A technical supplier can help purchasing teams evaluate identity, concentration, documentation, packaging and commercial conditions rather than treating the material as an undefined commodity.

ACETYL TETRAPEPTIDE-5 – TECHNICAL SUMMARY

Acetyl Tetrapeptide-5 is a synthetic acetylated cosmetic tetrapeptide primarily used in eye contour and advanced skin care formulations. Acetyl Tetrapeptide-5 is identified by CAS No. 820959-17-9 and has the molecular formula C20H28N8O7 with a molecular weight of approximately 492.49 g/mol. Its chemical structure is commonly represented as Ac-βAla-His-Ser-His-OH, and the chemical name N-acetyl-beta-alanyl-L-histidyl-L-seryl-L-histidine describes its sequence more explicitly.

The standardized cosmetic ingredient name is Acetyl Tetrapeptide-5. The acetylated tetrapeptide is strongly associated with eye-care products developed to improve the appearance of under-eye puffiness, eye bags, tired-looking skin and related visible signs around the eye contour. The cosmetic peptide can also be incorporated into broader anti-aging and multi-peptide facial formulations.

N-acetyl-β-alanyl-L-histidyl-L-seryl-L-histidine is hydrophilic and is particularly suitable for water-containing formulations such as eye serums, gels, creams, emulsions and hydrogel patches. Commercial product form is one of the most important considerations when purchasing the ingredient. High-purity acetylated tetrapeptide powder and a 0.1% cosmetic peptide solution are fundamentally different raw materials from a dosage perspective even though they contain the same active peptide.

A 0.1% solution used at 5% of a finished formulation provides approximately 0.005% actual peptide. A 10% addition of the same solution provides approximately 0.01% active peptide. Consequently, formulation percentages must always state whether they refer to the commercial raw material or the active peptide concentration.

N-acetyl-beta-alanyl-L-histidyl-L-seryl-L-histidine is normally introduced into cosmetic formulations during the cool-down or final manufacturing stage. Commercial solution grades may recommend addition below approximately 40°C, although the exact processing requirement should always be confirmed through the current TDS of the selected product. The acetylated cosmetic tetrapeptide can be combined with hyaluronic acid, caffeine, niacinamide, panthenol, betaine, glycerin, ceramides and compatible cosmetic peptides to build multifunctional eye-care systems.

The acetylated tetrapeptide's advantages include specialized eye-contour positioning, compatibility with lightweight aqueous formulations, low active dosage, premium peptide identity and flexibility in multi-active skin care development. Its limitations should also be understood. N-acetyl-β-alanyl-L-histidyl-L-seryl-L-histidine is not a pharmaceutical treatment for edema, cannot be expected to correct every anatomical form of eye bag, is not a universal solution for all dark circles, does not preserve a cosmetic product and does not replace the need for appropriate formulation, stability and safety testing.

ACETYL TETRAPEPTIDE-5 SUPPLY FROM ATAMAN KIMYA

Acetyl Tetrapeptide-5 is an ingredient whose commercial form and active concentration are particularly important when evaluating sourcing options. Companies seeking Acetyl Tetrapeptide-5 for cosmetic manufacturing, formulation development and commercial skin care applications can contact Ataman Kimya to inquire about product availability, technical specifications and supply conditions. Ataman Kimya can be contacted for product information and commercial quotations based on the buyer's specific formulation and purchasing requirements.

Technical buyers should evaluate N-acetyl-beta-alanyl-L-histidyl-L-seryl-L-histidine according to active concentration, peptide purity or assay, carrier composition, physical form, manufacturer, origin, storage, shelf life, packaging, MOQ, lead time and documentation. The Technical Data Sheet (TDS) provides general technical and formulation information, while the Safety Data Sheet (SDS) provides safe handling and storage information. The Certificate of Analysis (COA) confirms batch-specific conformity with the agreed specification, making these documents important components of a comprehensive purchasing evaluation.

For high-purity acetylated tetrapeptide powder, parameters such as peptide identity, HPLC purity, assay and storage conditions can be particularly important. For cosmetic solutions containing N-acetyl-β-alanyl-L-histidyl-L-seryl-L-histidine, active peptide concentration, carrier composition, pH, microbiological quality, preservation and processing recommendations become equally significant. These technical characteristics should be reviewed carefully to ensure that the selected material is suitable for the intended cosmetic formulation.

When comparing offers for the acetylated cosmetic tetrapeptide from different suppliers, price per kilogram should not be the only purchasing criterion. Buyers should normalize commercial quotations according to actual peptide content and calculate cost-in-use at the intended finished-product dosage. This approach provides a more meaningful comparison between high-purity peptide powders and diluted cosmetic solutions containing the same active ingredient.

Companies evaluating N-acetyl-beta-alanyl-L-histidyl-L-seryl-L-histidine supply through Ataman Kimya can provide their intended application, required product form, target concentration, quantity, packaging preference and documentation requirements when requesting product information or a commercial quotation. For replacement projects, sharing the technical specification, TDS or relevant properties of the currently used material can make technical comparison more precise. The appropriate acetylated tetrapeptide grade is ultimately the one that provides the required peptide identity, concentration, formulation compatibility, quality documentation and commercial conditions for the intended cosmetic product rather than simply the material carrying the lowest nominal price.