STEARIC ACID 50

Stearic acid 50 serves as a raw material for producing detergents, surfactants, waxes, and metallic stearates.
Stearic acid 50 is used as a processing aid, lubricant, and softening agent for polymers and rubbers.
Stearic acid 50 is occasionally used as an anti-caking agent or stabilizer in certain food preparations.

CAS Number: 67701‑03‑5 (fatty acids C16‑18, often called Stearic Acid 50)
EC / EINECS Number: 266‑928‑5
Molecular Formula: C₃₄H₆₈O₄ (combined formula of palmitic + stearic acids)
Molecular Weight: 540.90 g/mol

SYNONYMS:
Palmitic acid – stearic acid mixture, Fatty acids C16-18, Stearic acid - palmitic acid mixture, Acidum stearicum 50, Fatty acids C16-18, Palmitic acid stearic acid mixture, Stearic acid - palmitic acid mixture, Octadecanoic acid, n-Octadecanoic acid, C18 fatty acid, Stearin acid, Acidum stearicum (Latin), E570 (as a food additive code), 1-Octadecanoic acid, stearic acid 50, FATTY ACIDS C16-18, Parteck LUB STA 50, C16-18 FATTY ACIDS, STEARIC PALMITIC ACID, Fatty acids-(C16-C18), Stearic acid 50, Ph Eur, C16-18-Alkylcarboxylicacid, STEARIC ACID - PALMITIC ACID, Stearicpalmiticacidmixturegr, Acidum stearicum 50, Fatty acids C16-18, Palmitic acid stearic acid mixture, Stearic acid - palmitic acid mixture, edenor L2SM, fatty acids, C16-18, C16-18 fatty acids, C16-18 Saturated fatty acid, Palmitic acid-stearic acid mixt., Palmitic acid-stearic acid mixture, C16-18-Alkylcarboxylicacid, STEARIC ACID - PALMITIC ACID, STEARIC PALMITIC ACID, STEARIC PALMITIC ACID MIXTURE, PALMITIC STEARIC ACID MIXTURE, PALMITIC ACID - STEARIC ACID, Stearic acid 50, Ph Eur, STEARIC-PALMITIC ACID POWDER TECHNICAL

Stearic acid 50, a chemical compound containing a mixture of stearic acid and other fatty acids, has been extensively studied in scientific research, particularly in the fields of materials science, surface chemistry, and lubrication. 
Stearic acid 50is a long-chain saturated fatty acid commonly derived from animal and vegetable sources. 

Stearic Acid 50 is a mixture of long-chain saturated fatty acids, primarily palmitic acid (C16) and stearic acid (C18), with the composition tailored to roughly 50% stearic acid content. 
Stearic acid 50 is a waxy solid at room temperature, appearing as white or off-white flakes, beads, or powder. 

Stearic Acid 50 is obtained primarily from vegetable oils such as palm oil or animal fats and is characterized by a high degree of saturation, low iodine value, and long-chain hydrophobic hydrocarbon tails.
Stearic Acid 50 is preferred over pure stearic acid in many industrial formulations because its mixed composition provides an optimal balance between hardness, melting behavior, and emulsification efficiency. 

Stearic acid 50 is a vegetable-origin stearic acid.
Stearic acid 50, commonly referred to as long-chain fatty acids, is a group of saturated and unsaturated fatty acids that typically contain between 16 and 18 carbon atoms in their hydrocarbon chains. 

These fatty acids are derived from natural sources, such as vegetable oils and animal fats, and include palmitic acid (C16) and stearic acid (C18), among others. 
Stearic acid 50 is characterized by their hydrophobic nature due to the long carbon chains, which makes them insoluble in water but soluble in organic solvents. 

Stearic acid 50 is a saturated fatty acid with an 18-carbon chain. The IUPAC name of Stearic acid 50 is octadecanoic acid. 
Stearic acid 50 is a waxy solid and its chemical formula is C17H35CO2H. 
Stearic acid 50's name comes from the Greek word στέαρ “stéar”, which means tallow. 

The salts and esters of stearic acid are called stearates. 
As its ester, Stearic acid 50 is one of the most common saturated fatty acids found in nature following palmitic acid. 
Stearic acid 50 derived from three molecules of stearic acid is called stearin.

Stearic acid 50 is a fatty acid which is derived from palm oil and palm kernel oil. 
Stearic acid 50 is used in cosmetic products or used as feedstock to produce derivatives such as MCTs, soap, and metallic soap.
Stearic acid 50 is produced from the splitting of fats at high temperature and pressure.

Stearic acid 50 is available as broad cuts or purer fatty acids by simple or fractional distillation.
Stearic acid 50 is a fine, white to off-white powder composed primarily of stearic acid, a saturated long-chain fatty acid derived from natural sources such as vegetable fats or tallow. 

The '50' refers to the approximate 50% active stearic acid content, with the balance made up of other fatty acids like palmitic acid. 
Stearic acid 50 meets monograph standards for use in pharmaceutical, cosmetic, and industrial applications and is often manufactured to conform with NF, Ph. Eur., or USP specifications.

Stearic acid 50 is an anionic oil-in-water emulsifier which is characterised by its good skin compatibility. 
Stearic acid 50 is a saturated fatty acid.

Stearic acid 50 is the most common saturated fatty acid occuring in natural fats. 
Stearic acid 50 is registered under the REACH Regulation and is manufactured in and / or imported to the European Economic Area, at ≥ 100 000 to < 1 000 000 tonnes per annum.

USES and APPLICATIONS of STEARIC ACID 50:
Chemical Industry: Stearic acid 50 serves as a raw material for producing detergents, surfactants, waxes, and metallic stearates.
Plastic and Rubber Industry: Stearic acid 50 is used as a processing aid, lubricant, and softening agent for polymers and rubbers.
Food Industry: Stearic acid 50 is occasionally used as an anti-caking agent or stabilizer in certain food preparations.

Stearic acid 50 has been employed as a coating material to modify the surface properties of various substrates. 
Research has focused on investigating Stearic acid 50's self-assembly behavior and interactions with different surfaces. 
The mechanism of action involves the adsorption of Stearic acid 50 molecules onto the surface, forming a monolayer or bilayer film. This self-assembled film imparts desirable properties such as hydrophobicity, corrosion resistance, and lubrication. 

The research applications of Stearic acid 50 include surface modification of metals, polymers, and nanoparticles, where it has been utilized to enhance the stability, tribological properties, and interfacial characteristics. 
Additionally, Stearic acid 50 has been used as a dispersing agent, binder, or rheology modifier in the formulation of various materials such as paints, inks, and cosmetics. 

Stearic acid 50's research applications contribute to advancements in surface science, materials engineering, and the development of functional coatings for diverse industrial and technological applications. 
By understanding the mechanisms and properties of Stearic acid 50, researchers aim to optimize its performance and explore its potential in various surface-related research areas.

Stearic Acid 50 has a wide variety of applications across different industries.
Cosmetic Industry: Stearic acid 50 is used in soaps, lotions, creams, shampoos, and lipsticks as an emulsifier, thickener, and stabilizer. It helps improve texture, consistency, and shelf-life of products.

Stearic acid 50 is a waxy solid at room temperature, appearing as white or off-white flakes, beads, or powder. 
This mixture is widely used in industrial, cosmetic, and pharmaceutical applications due to its unique physical and chemical properties. 
Unlike pure stearic acid, Stearic Acid 50 provides a balance between melting point, hardness, and chemical reactivity, making it versatile for multiple formulations.

Stearic acid 50 is widely available, cost-effective, and environmentally compatible, making it a key ingredient in modern chemical, cosmetic, and pharmaceutical industries.
Stearic acid 50 is used Cosmetics and Personal Care, Cleaning and Detergents, Industrial, Pharmaceutical and Veterinary, Oleo Solutions.

Use of Stearic acid 50: Cosmetics and Personal Care, Cleaning and Detergents, Industrial, Pharmaceutical and Veterinary
Use of Stearic acid 50: Cosmetics and Personal Care, Cleaning and Detergents, Industrial
Stearic acid 50 is used in the following products: washing & cleaning products, leather treatment products, polymers, textile treatment products and dyes, lubricants and greases and pH regulators and water treatment products.

Stearic acid 50 is used in the following areas: municipal supply (e.g. electricity, steam, gas, water) and sewage treatment and formulation of mixtures and/or re-packaging.
Stearic acid 50 is used for the manufacture of: textile, leather or fur.

Release to the environment of this substance can occur from industrial use: in processing aids at industrial sites, in the production of articles, as processing aid and as processing aid.
Other release to the environment of Stearic acid 50 is likely to occur from: indoor use (e.g. machine wash liquids/detergents, automotive care products, paints and coating or adhesives, fragrances and air fresheners).

Release to the environment of Stearic acid 50 can occur from industrial use: manufacturing of the substance.
Stearic acid 50 plays crucial roles in various biological processes, including energy storage, cellular structure, and signaling. 
In industrial applications, Stearic acid 50 is used in the production of soaps, detergents, cosmetics, and food additives. 

Additionally, Stearic acid 50 can undergo various chemical reactions, such as esterification and hydrogenation, to form derivatives that have enhanced properties for specific uses. 
Overall, Stearic acid 50 is versatile compounds with significant importance in both biological and industrial contexts.

In general, the applications of Stearic acid 50 exploit its bifunctional character, with a polar head group that can be attached to metal cations and a nonpolar chain that confers solubility in organic solvents. 
The combination leads to uses as a surfactant and softening agent. 

Stearic acid 50 undergoes the typical reactions of saturated carboxylic acids, a notable one being reduction to stearyl alcohol, and esterification with a range of alcohols. 
Stearic acid 50 is used in a large range of manufactures, from simple to complex electronic devices.

Stearic acid 50 is used by consumers, in articles, by professional workers (widespread uses), in formulation or re-packing, at industrial sites and in manufacturing.
Use oof Stearic acid 50: Cosmetics and Personal Care, Cleaning and Detergents, Industrial, Pharmaceutical and Veterinary

Stearic acid 50 enables the individually desired structure through its balanced fatty acid distribution and ideally supports the texture of your emulsion (cream, lotion, etc.) 
Stearic acid 50 can also be used as a consistency enhancer; the formulations result in a soft and smooth skin feel. 

Stearic acid 50 is preferably used in decorative cosmetics such as lipsticks and Mascaras.
Uses and applications of Stearic acid 50: Mold release agents,
Solubilizer, Pharmaceuticals, Emulsifying agent, Industries, and Pharma.

The commercial Stearic acid 50 contains palmitic and stearic acid. Stearic acid is used in the manufacture of stearates, lubricants, soaps, cosmetics etc. 
Further applications of Stearic acid 50 are in rubber compounds, coatings, food packaging and candles.

-Pharmaceutical Industry uses of Stearic acid 50: 
Stearic acid 50 acts as a lubricant, excipient, or coating agent in tablets and capsules. 
Stearic acid 50 is often used to control the release of active ingredients.

BENEFITS of STEARIC ACID 50:
*Emollient and Moisturizing: 
In cosmetics, Stearic acid 50 forms a protective barrier on the skin, reducing moisture loss and providing softness and smoothness.

*Emulsifying Properties: 
Stearic acid 50 helps stabilize oil-in-water and water-in-oil mixtures, improving the texture and consistency of creams, lotions, and soaps.

*Lubrication and Softening: 
Stearic acid 50 acts as a processing aid in pharmaceuticals, plastics, and rubber, reducing friction during manufacturing.

*Stability in Formulations: 
Stearic acid 50 enhances shelf-life by providing consistent texture and preventing separation in complex mixtures.

*Versatility: 
Stearic acid 50 is suitable for a wide range of applications from personal care products to industrial chemicals.

CHARACTERISTICS of STEARIC ACID 50:
*Waxy Texture: 
Solid at room temperature with smooth handling properties

*Thermal Behavior: 
Stearic acid 50 melts readily at moderate heat, allowing for easy incorporation into formulations

*Chemical Reactivity: 
Stearic acid 50 can react with alcohols to form esters, with bases to form soaps, and with metals to form metallic stearates

*Compatibility: 
Stearic acid 50 works well with oils, waxes, surfactants, and other fatty acids in formulations

*Safety: 
Generally safe to handle with minimal irritation; non-toxic under normal use, though powdered form may cause mild skin or respiratory irritation

PHYSICAL and CHEMICAL PROPERTIES of STEARIC ACID 50:
Physical state: solid
Color: No data available
Odor: No data available
Melting point/freezing point: No data available
Initial boiling point and boiling range: No data available
Flammability (solid, gas): No data available
Upper/lower flammability or explosive limits: No data available
Flash point: 202 °C - Cleveland open cup

Autoignition temperature: No data available
Decomposition temperature: No data available
pH: No data available
Viscosity, kinematic: No data available
Viscosity, dynamic: No data available
Water solubility: No data available
Partition coefficient: n-octanol/water: No data available
Vapor pressure: < 0,01 hPa at 20 °C
Density: No data available

Relative density: No data available
Relative vapour density: No data available
Particle characteristics: No data available
Explosive properties: Not classified as explosive
Oxidizing properties: none
Other safety information: Surface tension ca.0,03 mN/m at 20 °C
CAS Number: 67701‑03‑5 (fatty acids C16‑18, often called Stearic Acid 50)
EC / EINECS Number: 266‑928‑5

Molecular Formula: C₃₄H₆₈O₄ (combined formula of palmitic + stearic acids)
Molecular Weight: 540.90 g/mol
Appearance: Waxy solid — crystals, flakes, or powder; white to off‑white color
Physical Form: Solid at room temperature
Melting Point / Titer: ~54–59 °C (varies slightly with composition)
Boiling Point: ~370 °C (at 1013 hPa)
Flash Point: ~113 °C
Density: ~0.84 g/cm³ (approximate, typical for C16‑C18 mixtures)

Solubility: Insoluble in water; soluble in organic solvents (e.g., ethanol, light petroleum)
Composition: Mixture of palmitic acid (C16:0) and stearic acid (C18:0) — typically ~50–66 % palmitic 
and ~32–60 % stearic depending on grade and supplier
Iodine Value: Low (≤ ~1–4 g I₂/100 g), indicating high saturation of fatty acids
Acid Value: ~194–213 mg KOH/g — indicates the amount of free fatty acids present
Saponification Value: ~200–213 mg KOH/g — typical of long‑chain saturated fatty acids
pH (in aqueous dispersion): Not typically defined (as solid fatty acids do not dissolve readily in water)

Chemical Nature: Long‑chain saturated fatty acids mixture (carboxylic acids) — behaves like typical fatty acids chemically
Reactivity: Can form salts (soaps) with bases
Reactivity: Can form esters with alcohols
Generally stable; not reactive with mild acids or bases
Hydrophobic: Yes — strongly repels water due to long hydrocarbon chains (typical of saturated fatty acid mixtures)
Source: Often derived from vegetable fats / palm oil or tallow as a 50/50 mix of C16 and C18 fatty acids
Hazard Classification: May be slightly irritating to skin in powdered form (hazard codes indicating irritation in material safety data)

Storage: Stable at room temperature; protect from moisture and direct heat
Melting point: 54-59 °C
Boiling point: 370°C/1013hPa
Flash point: 113 °C
Storage temp: room temp
Form: powder
Biological source: palm oil
BRN: 608585

EPA Substance Registry System: Fatty acids, C16-18 (67701-03-5)
CBNumber: CB6270975
Molecular Formula: C34H68O4
Molecular Weight: 540.90132
MDL Number: MFCD00241640
MOL File: 67701-03-5.mol
UNSPSC Code: 12352106
NACRES: NA.25
Assay: 95.00 to 100.00
Food Chemicals Codex Listed: No

Soluble in: water, 0.04073 mg/L @ 25 °C (est)
InChI: InChI=1/C17H34O2/c1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17(18)19/h2-16H2,1H3,(H,18,19)
SMILES: CCCCCCCCCCCCCCCCC(=O)O
CAS Number: 67701‑03‑5
Molecular Formula (representing the mixture of C16 and C18 fatty acids): C34H68O4
Molecular Weight: ~540.90 g/mol
Appearance: White to off-white flakes, beads, or powder
Physical Form: Solid waxy material
Melting Point: 54–59 °C (depending on composition)

Boiling Point: ~370 °C at standard pressure
Flash Point: ~113 °C
Density: ~0.84 g/cm³
Solubility: Insoluble in water; soluble in ethanol, 
acetone, ether, and other organic solvents
Acid Value: 194–213 mg KOH/g
Saponification Value: 200–213 mg KOH/g
Iodine Value: ≤ 4 g I2/100g (low, indicating high saturation)
Chemical Nature: Saturated long-chain fatty acids (carboxylic acids)
Hydrophobicity: Highly hydrophobic, repels water due to long hydrocarbon chains
Stability: Chemically stable under normal conditions; sensitive to strong oxidizers

FIRST AID MEASURES of STEARIC ACID 50:
-Description of first-aid measures
*General advice:
Show this material safety data sheet to the doctor in attendance.
*If inhaled:
After inhalation: 
Fresh air.
*In case of skin contact: 
Take off immediately all contaminated clothing. 
Rinse skin with
water/ shower.
*In case of eye contact:
After eye contact: 
Rinse out with plenty of water. 
Call in ophthalmologist. 
Remove contact lenses.
*If swallowed:
After swallowing: 
Immediately make victim drink water (two glasses at most). 
Consult a physician.
-Indication of any immediate medical attention and special treatment needed.
No data available

ACCIDENTAL RELEASE MEASURES of STEARIC ACID 50:
-Environmental precautions:
Do not let product enter drains.
-Methods and materials for containment and cleaning up:
Cover drains. 
Collect, bind, and pump off spills. 
Observe possible material restrictions. 
Take up dry. 
Dispose of properly. 
Clean up affected area.

FIRE FIGHTING MEASURES of STEARIC ACID 50:
-Extinguishing media:
*Suitable extinguishing media:
Carbon dioxide (CO2) 
Foam 
Dry powder
*Unsuitable extinguishing media:
For this substance/mixture no limitations of extinguishing agents are given.
-Further information:
Prevent fire extinguishing water from contaminating surface water or the ground water system.

EXPOSURE CONTROLS/PERSONAL PROTECTION of STEARIC ACID 50:
-Control parameters:
--Ingredients with workplace control parameters:
-Exposure controls:
--Personal protective equipment:
*Eye/face protection:
Use equipment for eye protection. 
Safety glasses
*Body Protection:
protective clothing
*Respiratory protection:
Recommended Filter type: Filter A 
-Control of environmental exposure:
Do not let product enter drains.

HANDLING and STORAGE of STEARIC ACID 50:
-Conditions for safe storage, including any incompatibilities:
*Storage conditions:
Tightly closed. 
Dry.

STABILITY and REACTIVITY of STEARIC ACID 50:
-Chemical stability:
The product is chemically stable under standard ambient conditions (room temperature).
-Possibility of hazardous reactions:
No data available