BTA BENZOTRIAZOLE

BTA Benzotriazole, also known as Benzotriazole, 1H-Benzotriazole, 1,2,3-Benzotriazole, BTA, BTAH and CAS No. 95-14-7, is a white to light cream-colored crystalline heterocyclic organic compound consisting of a triazole ring with three nitrogen atoms fused to a benzene ring, and is used particularly as a corrosion inhibitor for copper and copper alloys in cooling water treatment, antifreeze and engine coolants, metalworking fluids, aircraft deicing fluids and detergent formulations.
Benzotriazole, or BTA for short, is one of the rare organic inhibitors that can chemically bond to the copper surface thanks to the nitrogen atoms in its triazole ring, form a nanometer-thick protective complex film on the metal surface, and show high efficiency at low dosages; it is regarded in industry as the reference inhibitor for the protection of “yellow metals” such as copper, brass, bronze and silver.
Water treatment, antifreeze and metalworking systems containing BTA Benzotriazole in their formulations form a stable, thin and water-resistant protective layer on the metal surface, as the triazole ring forms a polymeric complex with copper ions.
The use of this 1H-Benzotriazole-based raw material in formulations can provide functional benefits such as reducing the corrosion rate of copper and copper alloys, preventing surface discoloration and tarnishing, limiting pitting corrosion caused by dissolved copper ions on steel and aluminum surfaces, and extending equipment life.
BTA acts through both surface adsorption and metal complex formation mechanisms, owing to its planar aromatic structure, its weakly acidic N–H group and its nitrogen atoms capable of donating electrons to metal ions.
Benzotriazole is easily incorporated into aqueous and glycol-based systems thanks to its reasonable solubility in water, its ability to form salts in alkaline media and its ready miscibility with glycols and alcohols, and it contributes to long-term metal protection, surface stability and system reliability in formulations in which BTA is used.

BTA Benzotriazole is a functional raw material used to help reduce problems such as corrosion of copper pipes and heat exchangers in cooling systems, yellow metal wear in antifreezes, staining of copper alloy parts in metalworking fluids, tarnishing of copper surfaces during storage and transport, and corrosion due to galvanic effects in mixed-metal systems.
BTA interacts with the copper surface in a controlled manner, limiting both anodic dissolution and cathodic oxygen reduction, and helps maintain the long-term chemical stability of the metal surface.
In water treatment, antifreeze, lubricant, detergent and coating formulations, it is a functional and economical component that, thanks to its low use level and high efficiency, helps keep the corrosion resistance of the system and the reliability of the equipment at the desired level.
Systems containing BTA Benzotriazole support the development of longer-lasting heat exchangers and radiators, cooling circuits requiring less maintenance, stain-free copper and brass parts, and more reliably operating industrial equipment for the end user.

1H-Benzotriazole is an effective organic inhibitor that can support several performance properties simultaneously in corrosion-inhibiting systems, thanks to its triazole ring, aromatic structure and high affinity for copper.
Thanks to its ability to form a persistent film on the metal surface and its effectiveness over a wide pH range, Benzotriazole helps meet multiple needs such as corrosion prevention, discoloration control, reduction of metal ion release and protection of mixed-metal systems, compared with alternatives that rely on a single mechanism.
It can be evaluated in open and closed-loop cooling systems, engine coolants, water-soluble and synthetic metalworking fluids, hydraulic and functional fluids, aircraft deicing fluids, dishwasher detergents, vapor-phase corrosion inhibitor (VCI) packaging and electronic process chemicals, and can also be used as an antifoggant in photographic chemicals and as an intermediate in organic synthesis.
While BTA helps formulators develop durable and long-lasting corrosion-inhibiting systems, it can provide manufacturers with practical benefits such as low dosage, easy dissolution, good storage stability and compatibility with other inhibitors.

WHAT IS BTA BENZOTRIAZOLE?

BTA Benzotriazole, also known in industrial chemistry as Benzotriazole or 1H-Benzotriazole, or BTA for short, is a white to light cream-colored, crystalline synthetic heterocyclic compound with the molecular formula C₆H₅N₃, formed by the fusion of a benzene ring and a 1,2,3-triazole ring. BTA Benzotriazole is also referred to by names such as 1,2,3-Benzotriazole, 1H-1,2,3-Benzotriazole, Benzotriazol, Azimidobenzene, Aziminobenzene, Benzene Azimide and BTAH. It is commercially available in different physical forms such as powder, granules, flakes and needle crystals, as well as in the form of a sodium salt solution (Sodium Benzotriazole).
Depending in particular on purity, melting point, moisture content, ash content, color value, solution clarity and physical form, it may show different dissolution and processing behavior in different applications. BTA Powder, BTA Granules, Benzotriazole 99%, Copper Corrosion Inhibitor, Yellow Metal Inhibitor and Sodium Benzotriazole are terms that may be encountered in technical and commercial searches. However, not all of these terms describe the same product in every case. For example, solid 1H-Benzotriazole and aqueous Sodium Benzotriazole solution are based on the same active structure but are two separate commercial forms with different active content, different pH values and different methods of use.
In commercial language, the term “Benzotriazole” is sometimes also used for different compounds carrying the benzotriazole core. For example, benzotriazole-type UV absorbers used in plastics and coatings, 1-Hydroxybenzotriazole (HOBt) used in peptide synthesis, and Tolyltriazole (TTA), which is common in water treatment, show structural similarity to BTA but are chemically different products. The product covered on this page is 1H-Benzotriazole, i.e. BTA, used as an industrial corrosion inhibitor. Therefore, the product meant should always be clarified during ordering and quotation processes.
Furthermore, not all BTA Benzotriazole products on the market have the same physical properties or the same processing behavior. The purity, melting point, moisture content, ash content, color value, particle size and physical form of the product can significantly change its dissolution rate, dusting behavior and appearance in the formulation. Therefore, it should not be assumed that products from different manufacturers can be technically substituted for one another merely by looking at the product name “BTA” or “Benzotriazole”.
Benzotriazole is a pure organic compound consisting of a single molecule; however, depending on the position of the hydrogen atom in the triazole ring, the molecule can exist in two tautomeric forms, 1H- and 2H-. In the solid state and in solution, the predominant form is 1H-Benzotriazole. The N–H group in the triazole ring shows weakly acidic character and donates a proton in alkaline media to form the benzotriazolate anion. This structural feature forms the basis of BTA's ability both to adsorb onto the metal surface and to form stable polymeric complexes with copper ions.
BTA Benzotriazole can be used in particular as a copper corrosion inhibitor in open and closed-loop cooling waters, as a yellow metal protector in engine coolants and antifreezes, as an additive in metalworking fluids and functional fluids, as a corrosion inhibitor in aircraft deicing fluids, and as an auxiliary component in detergents, VCI packaging, electronics and photographic chemicals. Depending on the application area, more specific product designations such as powder BTA, granular BTA, sodium benzotriazole solution or ready-made inhibitor blends containing BTA may be used.
The performance of BTA does not depend solely on its chemical identity. Purity, moisture, ash, color, melting point, particle size and impurity profile can affect the formulation result. Therefore, two BTA products sold under the same name may not have the same dissolution rate, solution color, dusting behavior or appearance in the final product.

Depending on the quality grade, BTA can be evaluated in water treatment chemicals, antifreeze and engine coolants, metalworking fluids, hydraulic and functional fluids, aircraft deicing and anti-icing fluids, dishwasher detergents, VCI packaging materials, paint and coating additives, electronic process chemicals, photographic chemicals and organic synthesis applications. Its most common use is the protection of copper and copper alloys in water treatment, antifreeze and metalworking fluids.

Thanks to this adsorption and complexation potential in its chemical structure, BTA Benzotriazole, particularly when it comes into contact with a copper or copper oxide surface, bonds to copper(I) ions through the nitrogen atoms in the triazole ring and forms a Cu(I)-BTA polymeric complex film on the surface. Described in industry by different functional names such as copper corrosion inhibitor, yellow metal inhibitor and metal passivator, this compound makes it possible to form a protective layer thin enough not to significantly affect heat transfer while isolating the metal surface from its environment. This structure supports the equipment life of cooling systems, the mixed-metal protection performance of antifreezes, the part quality of metalworking fluids and the surface appearance of stored copper products.
Commercially available BTA products come in different purities and physical forms depending on the purification and crystallization processes applied during production. Industrial BTA is generally produced by diazotization of o-phenylenediamine with sodium nitrite in acidic medium followed by ring closure; it is then brought into powder, granule or flake form through distillation, crystallization and shaping steps. This white to light cream-colored crystalline raw material may vary in terms of dissolution rate, solution appearance and ease of use depending on technical parameters such as purity, melting point, moisture, color and particle size. In conclusion, BTA Benzotriazole is a fundamental corrosion inhibitor for copper and copper alloys, used across a wide range from cooling towers to antifreezes.

COMMON PRODUCT AND CHEMICAL NAMES:

BTA Benzotriazole

Benzotriazole

Benzotriazol

BTA

BTAH

1H-Benzotriazole

1H-Benzotriazol

1,2,3-Benzotriazole

1H-1,2,3-Benzotriazole

Benzo-1,2,3-triazole

Azimidobenzene

Aziminobenzene

Benzene Azimide

1,2-Aminoazophenylene

BZT

BTA Powder

BTA Granules

BTA Flakes

Benzotriazole 99%

Copper Corrosion Inhibitor

Yellow Metal Inhibitor

Bakır Korozyon İnhibitörü (Turkish: Copper Corrosion Inhibitor)

Sodium Benzotriazole (sodium salt solution)

Some of these names express chemical identification, some the physical form, and others the application area or commercial function. For example, 1H-Benzotriazole and 1,2,3-Benzotriazole indicate chemical names based on the IUPAC approach, while BTA is the common abbreviation. Azimidobenzene and Aziminobenzene are synonyms found in older literature and in some registries. BTA Powder, BTA Granules and BTA Flakes refer to the physical form of the product, while Copper Corrosion Inhibitor and Yellow Metal Inhibitor are commercial designations referring to the function of the product.
It is important that the CAS number used for BTA Benzotriazole be evaluated together with the actual identity of the product. CAS No 95-14-7 and EC No 202-394-1 are listed in sources for 1H-Benzotriazole. Sodium benzotriazole, tolyltriazole, 1-hydroxybenzotriazole and benzotriazole-type UV absorbers are separate substances with different CAS numbers. Therefore, during purchasing it should be verified through the documents whether the product is pure BTA, a BTA salt or a derivative.

CAS NO, EC / EINECS NO AND CHEMICAL IDENTIFICATION

Product name: BTA Benzotriazole / 1H-Benzotriazole

Common abbreviation: BTA

Chemical name: 1H-1,2,3-Benzotriazole

CAS No: 95-14-7

EC / EINECS No: 202-394-1

Molecular formula: C₆H₅N₃

Molecular weight: Approximately 119.12 g/mol

Chemical class: Heterocyclic aromatic azole / benzotriazole derivative

Main functions: Corrosion inhibitor for copper and copper alloys, metal passivator, yellow metal protector, antifoggant and synthesis intermediate

BTA Benzotriazole is a substance consisting of a single organic molecule of defined composition. Therefore, unlike natural mixtures, it is defined by an exact molecular formula and molecular weight; differences between commercial products arise from purity, impurity profile and physical form.
CAS No 95-14-7 and EC No 202-394-1 for 1H-Benzotriazole are listed in various official and technical sources. This registration is a general identification covering the different physical forms of solid BTA (powder, granules, flakes, needle crystals).
However, using a single CAS number for BTA Benzotriazole may not be sufficient for every commercial product. Since sodium benzotriazole solutions and ready-made inhibitor blends containing BTA have different chemical definitions and different active contents, the full product description and the relevant technical documents should be checked during purchasing.

Industrial BTA is not used as a food or pharmaceutical raw material. Compounds called benzotriazole encountered in the cosmetics and pharmaceutical sectors are generally not BTA itself but derivatives with different structures. The application area of the product is limited to industrial corrosion prevention, water treatment, functional fluids, detergents and chemical synthesis applications.
Although BTA Benzotriazole is defined as a single pure component, commercial grades may contain trace o-phenylenediamine residues, colored by-products, moisture and inorganic residues. Therefore, even among products with the same CAS number, the impurity profile can change the solution color and performance in some sensitive applications.

CHEMICAL STRUCTURE AND MOLECULAR PROPERTIES OF BTA BENZOTRIAZOLE

BTA Benzotriazole has a planar, aromatic and bicyclic structure formed by the fusion of a benzene ring with a five-membered triazole ring containing three nitrogen atoms. This structure gives the molecule hydrophobic aromatic character on one side and polar, electron-donating nitrogen atoms capable of binding to metal ions on the other.
The structural features of the molecule can be summarized as follows: the benzene ring gives the molecule aromatic stability and hydrophobic character; the three nitrogen atoms in the triazole ring can form coordination bonds with metal ions; the N–H group shows weakly acidic character and is deprotonated in alkaline media to form the benzotriazolate anion; the molecule also carries very weak basic character.
BTA can exist in two tautomeric forms, 1H- and 2H-. 1H-Benzotriazole is the predominant form in the solid state and in solution. The acid dissociation constant (pKa) of the molecule is around 8.2; therefore, in the neutral and alkaline pH range both the neutral molecule and the anion form are present, and both forms can interact with the copper surface.

The technical performance of 1H-Benzotriazole cannot be understood from its chemical structure alone. Purity, impurity profile, moisture, ash, color, melting point and particle size are important parameters determining product behavior.
Its planar structure allows BTA molecules to pack tightly on the copper surface and to link to one another through copper(I) ions, forming a chain-like polymeric complex. Since this complex has very low solubility in water and in many organic solvents, it creates a persistent protective layer on the surface.
The hydrophobic character of the aromatic ring forms a barrier on the outer surface of the protective film that repels water and aggressive ions. This property is one of the main reasons why copper surfaces protected with BTA are more resistant to oxygen, chloride and sulfur compounds.

PHYSICAL AND CHEMICAL PROPERTIES OF BTA BENZOTRIAZOLE

BTA Benzotriazole is generally a white to light cream or light beige, crystalline solid with a slight characteristic odor. Its physical appearance may vary depending on the production method, degree of purification, storage time and commercial form.

General technical properties:

Physical appearance: White to light cream-colored crystalline powder, granules, flakes or needle crystals

Chemical character: Heterocyclic aromatic azole

Molecular formula: C₆H₅N₃

Molecular weight: Approximately 119.12 g/mol

CAS No: 95-14-7

EC / EINECS No: 202-394-1

Purity: Generally specified as 99% and above in commercial grades

Melting point: Approximately in the range of 96–100 °C

Boiling point: High; since there is a risk of thermal decomposition at atmospheric pressure, distillation is generally carried out under reduced pressure

Density: Approximately 1.3–1.4 g/cm³ for the solid; bulk density depends on the physical form

Solubility in water: Approximately 20 g/L at room temperature; increases with temperature

Solubility in alkaline media: Increases markedly through salt formation with sodium hydroxide or amines

Organic solvents: Soluble in solvents such as alcohols, glycols, acetone, ethyl acetate, aromatic hydrocarbons and DMF

pKa: Approximately 8.2 (weak acid)

Moisture content: Generally specified below 0.1–0.2%

Ash content: Generally specified with a very low upper limit

Flash point: High; the current value should be checked in the supplier's SDS

Reactivity: May react with strong oxidizers; may decompose at high temperatures; in fine powder form may form a combustible dust mixture with air

The physical properties of BTA Benzotriazole can vary significantly depending on the form of the product. Fine powder BTA dissolves faster but has a higher tendency to dust; granular and flake forms generate less dust, flow more easily and can offer more predictable handling behavior in automatic dosing systems.
Purity and color value are among the most important quality parameters of BTA Benzotriazole in terms of technical performance. Colored by-products present in lower-purity products may cause darkening in the color of the solution and the final formulation. This is particularly important in light-colored detergent, antifreeze and functional fluid formulations.
Melting point is a practical quality test that gives a quick indication of product purity. In products containing impurities, the melting range may broaden and shift to a lower temperature. Therefore, melting point is widely used to check batch-to-batch quality consistency.
These values are for general technical introduction; they should not be used as the binding specification of the product to be purchased. In particular, parameters such as purity, melting point, moisture, ash, color, solution clarity, particle size, physical form and impurity content should be checked against the supplier's current TDS and COA documents.

HOW DOES BTA BENZOTRIAZOLE WORK AT THE MOLECULAR LEVEL?

The primary effect of BTA Benzotriazole in formulations takes place through the nitrogen atoms in the triazole ring forming coordination bonds with the copper surface and creating a water-insoluble polymeric complex film on the surface.
When the copper surface comes into contact with oxygen in the environment, it forms a thin copper(I) oxide layer. BTA molecules adsorb onto this surface, donate a proton from the N–H group, bond with copper(I) ions and form the chain-structured polymeric complex described as Cu(I)-BTA. This mechanism forms the basis for the use of BTA as a copper corrosion inhibitor.
The resulting film can range in thickness from a few nanometers to a few tens of nanometers, and since it limits both anodic copper dissolution and cathodic oxygen reduction, BTA is regarded as a mixed-type (anodic-cathodic) inhibitor.
The protective film can renew itself as long as BTA is continuously present in the system at a low concentration. Therefore, in long-term systems such as cooling water and antifreeze, it is important to monitor BTA consumption and keep the concentration at a certain level.

The molecular and surface-level functions of BTA Benzotriazole may differ depending on the application:

Forming a protective complex film on copper and copper alloy surfaces

Limiting anodic metal dissolution

Slowing cathodic oxygen reduction

Reducing the release of dissolved copper ions into the system

Limiting copper ions from depositing on steel and aluminum and initiating pitting corrosion

Preventing tarnishing and discoloration on copper and silver surfaces

Reducing copper's catalysis of oxidation as a metal deactivator in lubricants

Protecting metal surfaces inside closed packaging in the vapor phase

Acting as an antifoggant in photographic chemicals

Serving as a reactive intermediate and synthetic auxiliary in organic synthesis

While the aromatic ring forms a hydrophobic layer oriented outward from the surface, the triazole ring binds tightly to the metal. This dual structure enables BTA-based protective films to achieve both strong surface adhesion and a barrier effect against water and aggressive ions.
The rate and quality of film formation are directly related to BTA concentration, pH, temperature, surface cleanliness, the presence of chloride and sulfur ions in the environment and oxidizing biocides. Therefore, BTA Benzotriazole should not be evaluated on its own but together with the inhibitor package, biocide program and water chemistry with which it is used.
The effectiveness of BTA is generally higher in the neutral and slightly alkaline pH range. In strongly acidic media, film formation may weaken because the molecule can become protonated; however, BTA can also be evaluated as a copper protector in certain acidic cleaning and pickling applications.
However, it should not be assumed that BTA Benzotriazole will provide the same protection performance in every system. The BTA quality used, dosage, water chemistry, temperature, flow conditions, other additives and metal type should be evaluated through laboratory and field trials.

IN WHICH SECTORS IS BTA BENZOTRIAZOLE USED?

Benzotriazole is a versatile raw material used in various industrial fields, primarily the water treatment, automotive and metalworking sectors, thanks to its high affinity for copper and high efficiency at low dosage. The purpose of use may vary depending on the form, purity and formulation system of the product.

Main application areas:

Open-loop cooling tower water treatment

Closed-loop cooling and heating systems

Chiller and heat exchanger corrosion protection

Antifreeze and engine coolants

Water-soluble and synthetic metalworking fluids

Hydraulic fluids and functional fluids

Lubricant and grease formulations (as a metal deactivator)

Aircraft deicing and anti-icing fluids

Dishwasher detergents (metal and silver protection)

Industrial cleaning and pickling formulations

VCI (vapor-phase corrosion inhibitor) paper, film and packaging

Paint, coating and varnish additives

Surface passivation of copper pipe, wire and brass parts

Electronic process chemicals and copper surface protection

Photographic chemicals (antifoggant)

Conservation of metal artifacts and bronze

Organic synthesis and chemical intermediate production

The most common uses of Benzotriazole are cooling water treatment programs and antifreeze and metalworking fluids. These products are preferred especially in mixed-metal systems where copper, brass and bronze components are present together with steel, cast iron and aluminum.
The performance each sector expects from BTA Benzotriazole is different. For example, a water treatment company may prioritize ease of dosing, dissolution rate and compatibility with other inhibitors, while an antifreeze manufacturer may focus on high purity and long-term stability, a detergent manufacturer on low color value and formulation appearance, and an electronic chemicals manufacturer on low impurity and metal ion content.

USE OF BTA BENZOTRIAZOLE IN WATER TREATMENT AND COOLING SYSTEMS

In water treatment formulations, BTA Benzotriazole is generally used as part of an inhibitor package together with components such as phosphonates, polymeric dispersants, zinc, molybdate or orthophosphate. This combination is commonly referred to in the sector as a “yellow metal inhibitor” or an “azole program”.

Possible functions of BTA Benzotriazole in water treatment and cooling systems include:

Protecting copper and brass heat exchanger tubes against corrosion

Lowering the dissolved copper concentration in cooling water

Limiting copper ions from initiating pitting corrosion on steel surfaces

Helping maintain the efficiency of heat transfer surfaces

Supporting mixed-metal protection in closed loops

Helping extend equipment maintenance intervals

Contributing to reducing the amount of copper in discharge water

BTA-based inhibitor programs can be evaluated especially in industrial cooling towers, HVAC systems, chiller circuits, power plant condensers and process cooling systems.
In water treatment applications, BTA is generally incorporated into liquid products either as a sodium benzotriazole solution by dissolving it with sodium hydroxide, or dissolved in glycol-water mixtures. The liquid formulation is fed into the system via a continuous dosing pump, and the active azole concentration in the circuit is monitored regularly.
In newly commissioned systems or systems after chemical cleaning, a higher pre-passivation dosage may initially be applied to passivate the copper surface rapidly; this is then followed by a switch to a low maintenance dosage.
In open-loop cooling systems, oxidizing biocides such as chlorine, hypochlorite or bromine can weaken the BTA film and increase azole consumption. Therefore, the biocide program and the azole program should be planned together.
That a BTA product will give the same result in every water chemistry should not be inferred merely from the name “Benzotriazole”. Coupon tests and field monitoring should be carried out based on water analysis, metallurgy, operating conditions and the targeted corrosion rate.

ANTIFREEZE, METALWORKING FLUID AND FUNCTIONAL FLUID APPLICATIONS OF BTA BENZOTRIAZOLE

In the appropriate quality grade, BTA Benzotriazole can be evaluated as a yellow metal protective component in antifreeze and engine coolants, water-soluble and synthetic metalworking fluids, hydraulic fluids, aircraft deicing fluids and various functional fluids.

Functions for which BTA can be evaluated in these applications may include:

Protecting copper and brass in radiators, heater cores and fittings

Limiting mixed-metal corrosion at soldered joints

Serving as the azole component in organic acid technology (OAT), inorganic and hybrid antifreeze packages

Preventing staining and tarnishing of copper alloy parts during metalworking

Reducing the negative effect of dissolved copper on metalworking fluid life

Contributing to the protection of metal components in aircraft deicing fluids

Limiting the catalytic oxidation effect of copper in oil and fluid systems

When purchasing BTA Benzotriazole for antifreeze, metalworking and functional fluid applications, the following should be checked:

Purity and impurity profile

Color (especially for light-colored and dyed fluids)

Melting point

Moisture content

Dissolution behavior in glycol and water systems

Current technical specification

Certificate of analysis (COA)

Safety data sheet (SDS)

Manufacturer and batch traceability

Compliance and certification documents where required

In antifreeze applications, BTA and tolyltriazole are often used together or as alternatives to one another. Which azole is used, and at what ratio, is determined by the overall structure of the inhibitor package and the targeted standard tests.
Likewise, it cannot be said that a BTA product suitable for water treatment is automatically suitable for a light-colored detergent or a sensitive electronics application. The relevant quality requirements and manufacturer documents should be checked for each application.

IS BTA BENZOTRIAZOLE USED IN COSMETIC, FOOD AND PHARMACEUTICAL APPLICATIONS?

Industrial BTA Benzotriazole, i.e. 1H-Benzotriazole, should not be used as a raw material in cosmetic, personal care, food or pharmaceutical products. The product is manufactured for industrial corrosion prevention and chemical process applications and is not designed to meet the purity, documentation and regulatory requirements needed for those fields.
At this point, the difference between BTA and other compounds carrying the benzotriazole core is particularly important. Certain benzotriazole-type UV filters that may be encountered in sunscreens and cosmetic products, and 1-Hydroxybenzotriazole (HOBt), used in pharmaceutical synthesis to form peptide bonds, have names similar to BTA but are separate products with different chemical structures, different CAS numbers and subject to different regulations.
BTA may be used in some household dishwasher detergents to prevent tarnishing of metal and silverware. The quality of BTA to be used in the formulation of such products, its use level and the compliance of the final product with the relevant detergent and chemical regulations should be evaluated separately.
If the use of BTA-containing products is planned in cooling circuits of food processing plants or in systems with a possibility of indirect food contact, the compliance of the final formulation and the method of application with the relevant regulations should be evaluated separately.

INDUSTRIAL APPLICATIONS OF BTA BENZOTRIAZOLE

BTA Benzotriazole is an important functional raw material used in many industrial systems due to its selective effectiveness on copper, low dosage requirement and compatibility with different systems.

The following functions may stand out in industrial BTA applications:

Copper corrosion inhibition

Brass and bronze protection

Prevention of silver tarnishing

Metal passivation

Protection of mixed-metal systems

Reduction of metal ion release

Metal deactivation

Vapor-phase corrosion prevention

Antifogging (photographic chemicals)

Acting as a reactive intermediate in organic synthesis

In the automotive sector, BTA Benzotriazole helps protect copper and brass components in radiator and heater circuits over long periods. It is therefore among the key inhibitor raw materials for antifreeze and engine coolant manufacturers.
In the water treatment sector, BTA is used to provide durability especially in applications where corrosion directly affects both equipment life and energy efficiency, such as copper-tube heat exchangers, condensers and chiller systems.
In metalworking, packaging, electronics and coating applications, BTA Benzotriazole can be evaluated to preserve surface quality on copper alloy parts, to prevent tarnishing during storage and transport, and to keep copper surfaces clean until subsequent process steps.

The following topics should be evaluated when using BTA Benzotriazole in industrial systems:

BTA form (powder, granules, flakes or sodium salt solution)

Purity and impurity profile

Melting point

Dissolution method (alkali, glycol or solvent)

Target active concentration

pH range

Water chemistry and conductivity

Presence of chloride, sulfur and oxidizing biocides

Types of metals in the system

Temperature and flow conditions

Compatibility with other inhibitors and additives

Performance requirements of the final product

WHICH PROBLEMS CAN BTA BENZOTRIAZOLE HELP SOLVE?

BTA Benzotriazole can help solve various problems associated with copper corrosion, metal ion release, surface tarnishing and mixed-metal interactions in water treatment, antifreeze, metalworking, detergent and packaging systems. However, its effect depends on the product quality used, dosage and system conditions.

Copper pipe corrosion in cooling systems

Copper-tube heat exchangers and condensers may suffer general and localized corrosion under aggressive water conditions. BTA-based inhibitor programs can help reduce the corrosion rate by forming a protective film on the copper surface.
However, the use of BTA alone does not guarantee complete protection under all conditions. Water chemistry, biological control, and scale and deposit control should be evaluated together.

Steel and aluminum corrosion caused by copper ions

Copper ions dissolved in cooling water can deposit as metallic copper on steel and aluminum surfaces, forming local galvanic cells and accelerating pitting corrosion. By reducing copper release, BTA can contribute to limiting this secondary corrosion risk.

Yellow metal wear in antifreezes

Copper, brass and solder components in radiator and heater circuits may corrode during long-term use. As part of the antifreeze inhibitor package, BTA can help protect these components.
However, it is not sufficient on its own; separate inhibitors are required for steel, cast iron and aluminum, and the package as a whole should be validated with standard tests.

Staining of copper alloy parts during metalworking

Water-soluble and synthetic metalworking fluids can cause discoloration and staining on copper and brass parts. BTA can help preserve part quality by forming a protective film on the surface.
However, the pH value, amine content, concentration and contamination level of the fluid also affect staining behavior.

Tarnishing of copper and silver surfaces during storage and transport

Copper, brass and silver surfaces may tarnish over time due to humidity and sulfur compounds in the air. Surface treatment with BTA or VCI packaging containing BTA can help preserve surface appearance.

Catalytic oxidation effect of copper in lubricants

Dissolved or surface copper can accelerate the oxidation of oils. BTA, and especially its oil-soluble derivatives, can contribute to limiting this effect as metal deactivators.
It should not be assumed that every BTA product will show the same dissolution and performance behavior; the use level should be verified through laboratory and field trials.

POINTS TO CONSIDER WHEN USING BTA BENZOTRIAZOLE

One of the most common mistakes in using BTA Benzotriazole is assuming that BTA is a general-purpose inhibitor that protects all metals. In fact, BTA is a selective inhibitor aimed particularly at copper and copper alloys; for steel, cast iron and aluminum it must be used together with additional inhibitors.

The following points should be considered when using BTA Benzotriazole:

The BTA form and quality appropriate to the intended use should be selected.

The difference in active content between solid BTA and sodium benzotriazole solution should be taken into account.

Purity, melting point and color should be checked.

The dissolution method (alkali, glycol or solvent) should be determined.

All metal types in the system should be evaluated.

The target active concentration should be determined and monitored regularly.

Interaction with oxidizing biocides should be taken into account.

The pH range should be kept under control.

Compatibility with other inhibitors and additives should be tested.

Dosage and formulation should be determined through laboratory and coupon trials.

Measures to prevent dusting should be taken when working with the powder form.

Manufacturer TDS and SDS documents should be reviewed.

Batch-based analysis results should be verified via the COA.

BTA Benzotriazole is a substance requiring careful handling with regard to inhalation of dust, ingestion and eye contact. Appropriate gloves, eye protection, a dust mask or respiratory protection, work clothing and adequate ventilation should be used to prevent dust formation during weighing, transfer, dissolution and mixing. Safe working procedures should be determined according to the product's current SDS.
Exposure to auxiliary raw materials used during dissolution, such as sodium hydroxide, amines and solvents, as well as wastewater and discharge requirements, should also be evaluated separately.

STARTING FORMULATION APPROACHES FOR BTA BENZOTRIAZOLE

The examples below are starting approaches prepared to show how BTA Benzotriazole can be evaluated in the formulation development process. They are not validated commercial recipes, production instructions or regulatory-compliant final formulas.
The ratios given are example starting levels for preliminary laboratory trials. The form and purity of the BTA used and the other raw materials can significantly change performance. Laboratory trials, performance tests, occupational safety and relevant regulatory checks should be carried out for each application.

EXAMPLE 1: PRELIMINARY TRIAL OF A LIQUID AZOLE CONCENTRATE FOR COOLING WATER

Objective: To prepare, from solid BTA, an easy-to-dose liquid sodium benzotriazole concentrate that can be used in cooling water treatment programs, and to examine its copper protection performance.

Starting approach:

BTA Benzotriazole: 10%

Sodium hydroxide solution (50%): approximately 6–7%

Demineralized water: balance (83–84%)

The amount of sodium hydroxide should be adjusted so as to ensure complete dissolution of BTA and to reach the targeted pH value. For different active content targets, the ratios should be changed accordingly.

Application approach:

Demineralized water is placed in a vessel with a stirrer.
The sodium hydroxide solution is added in a controlled manner.
BTA is added slowly under stirring and mixed until completely dissolved.
The pH, clarity and color of the solution are checked.
The concentrate is dosed into test water at different active BTA levels (for example 1, 2, 5 and 10 mg/L).
Weight loss and appearance tests are carried out with copper and brass coupons.
The dissolved copper content and the residual azole concentration in the test water are measured.
Compatibility with the other inhibitor package components and the biocide program is evaluated.
Appropriate eye, face and hand protection should be used when working with sodium hydroxide.

EXAMPLE 2: BTA RATIO SCREENING IN AN ANTIFREEZE INHIBITOR PACKAGE

Objective: To determine the effect of the BTA ratio on the protection of copper, brass and solder components in a glycol-based engine coolant.

Starting components:

BTA ratio: 0.05%, 0.1%, 0.2% and 0.3%

Glycol base and other inhibitors: kept constant

pH and other process conditions: kept constant

The BTA ratio is increased stepwise and the change in yellow metal protection performance is compared.

Application approach:

The glycol base is placed in a vessel with a stirrer.
BTA is completely dissolved in the glycol with gentle heating and stirring.
Other inhibitors, pH adjusters and additives are added.
The resulting samples are diluted under the same conditions.
Glassware corrosion tests such as ASTM D1384 are carried out with copper, brass, solder, steel, cast iron and aluminum coupons.
Weight change and surface appearance of the coupons are evaluated.
The ratio giving the most balanced protection result is determined.
It should not be assumed that a single BTA ratio will give the same result in all antifreeze inhibitor packages.

EXAMPLE 3: EVALUATION OF YELLOW METAL PROTECTION IN A WATER-SOLUBLE METALWORKING FLUID

Objective: To examine the effect of BTA on the staining and corrosion behavior of copper and brass parts in a water-soluble or synthetic metalworking fluid.

Starting approach:

Standard metalworking fluid concentrate: 100% base formula

BTA Benzotriazole: 0%, 0.1%, 0.2% and 0.5% in the concentrate

Other components: kept constant

The evaluation can be carried out by pre-dissolving BTA in an amine or glycol and adding it to the concentrate.

Application approach:

BTA is dissolved in an amine or glycol present in the formulation.
The solution is added to the metalworking fluid concentrate and homogenized.
The concentrates are diluted with water at the same ratio.
Copper and brass strips are immersed in the diluted fluid and held for a specified time and temperature.
Discoloration and staining on the strips are evaluated based on copper strip corrosion methods such as ASTM D130.
Emulsion stability, pH and foaming behavior are checked.
The appropriate use level for production is determined.
In such evaluations, the interaction of BTA with the pH balance of the fluid and with other additives should be taken into account, and the formulation should be rebalanced if necessary.

PRODUCTS SIMILAR TO BTA BENZOTRIAZOLE AND ALTERNATIVES

An alternative to BTA Benzotriazole is not merely a matter of choosing another corrosion inhibitor. When determining an alternative, the targeted metal type, water chemistry, presence of oxidizing biocides, solubility, ease of dosing, color, occupational safety requirements, regulations and final product performance should be evaluated together.

BTA BENZOTRIAZOLE AND TOLYLTRIAZOLE (TTA)

Tolyltriazole (TTA) is an azole inhibitor carrying an additional methyl group on the benzene ring and is structurally very similar to BTA. Therefore, when comparing BTA and TTA, two products from the same inhibitor family with different hydrophobicity are being evaluated.
Thanks to the methyl group, TTA can form a somewhat more hydrophobic protective film and may offer an economic advantage in some cooling water applications. TTA is widely used, especially in water treatment, in the form of liquid sodium tolyltriazole.
BTA, on the other hand, may be preferred in antifreeze, detergent, VCI and sensitive applications because it can be supplied at higher purity as a single defined molecule and has a broad application history. When switching between the two products, dosage and protection performance should be tested.

BTA BENZOTRIAZOLE AND SODIUM BENZOTRIAZOLE SOLUTION

Sodium benzotriazole is the salt form obtained by neutralizing BTA with sodium hydroxide and is generally supplied as an aqueous solution. It is based on the same active structure as solid BTA.
The liquid form provides ease of dosing by eliminating the need to dissolve powder and reduces the risk of dusting; however, its active content is lower, and since it is alkaline in character, it may affect the pH balance of the formulation.
Therefore, when switching between the two forms, the dosage calculation should be made on the basis of active BTA equivalent.

BTA BENZOTRIAZOLE AND HALOGEN-RESISTANT AZOLES

In cooling systems where oxidizing biocides such as chlorine, hypochlorite and bromine are used intensively, BTA and TTA films may weaken and azole consumption may increase. More halogen-resistant azoles, such as chlorinated tolyltriazole and certain alkyl-substituted benzotriazoles, have been developed for such systems.
These products may offer more persistent protection under certain conditions; however, their cost and availability differ.
Therefore, a switch to halogen-resistant azoles should be evaluated together with the biocide program and corrosion monitoring results.

BTA BENZOTRIAZOLE AND 2-MERCAPTOBENZOTHIAZOLE (MBT)

2-Mercaptobenzothiazole (MBT) and its sodium salt are compounds long known as copper corrosion inhibitors and used especially in older water treatment and antifreeze formulations.
MBT can bind strongly to the copper surface; however, it may be more sensitive to oxidation and may be limiting in some formulations in terms of odor and color.
For this reason, azole-based inhibitors, especially BTA and TTA, are more widely preferred today in many applications.

BTA BENZOTRIAZOLE AND GENERAL-PURPOSE CORROSION INHIBITORS

Nitrite, molybdate, silicate, phosphate, phosphonates and organic carboxylic acids are inhibitors used particularly for the protection of metals such as steel, cast iron and aluminum.
These inhibitors are not direct alternatives to BTA but are often complementary to it. While BTA protects yellow metals, the other inhibitors protect ferrous and light metals.
Therefore, in mixed-metal systems, using one of these products alone in place of BTA generally does not provide adequate copper protection.

BTA BENZOTRIAZOLE AND HOBt / BENZOTRIAZOLE-TYPE UV ABSORBERS

1-Hydroxybenzotriazole (HOBt) is a compound with a structure different from BTA, used as a coupling aid in pharmaceutical and peptide synthesis. Benzotriazole-type UV absorbers, on the other hand, are larger molecules of different structure used as light stabilizers in plastics, coatings and some cosmetic products.
These products are not alternatives to BTA used as a corrosion inhibitor and should not be confused with one another because of the similarity in names.
In selecting an alternative, the targeted metal protection performance, water chemistry, biocide compatibility, color and cost should be determined through comparative laboratory and field tests.

QUALITY CONTROL AND PURCHASING CRITERIA FOR BTA BENZOTRIAZOLE

When purchasing BTA Benzotriazole, deciding solely on the basis of product name and price is not sufficient. In particular, different physical forms such as powder, granules and flakes, as well as products from different manufacturers, may have different technical properties.

Information recommended to be reviewed before purchasing:

Product name and manufacturer

BTA form (powder, granules, flakes, needle crystals or sodium salt solution)

Whether it is pure BTA or a derivative or blend

CAS number

EC / EINECS number

Purity (assay)

Melting point

Moisture content

Ash content

Color and solution appearance

Solution clarity

Particle size or granulometry

Impurity content

Active content and pH for solution products

Technical data sheet (TDS)

Safety data sheet (SDS)

Certificate of analysis (COA)

Production and batch information

Origin information

Packaging type and net quantity

Storage conditions

Shelf life or retest information

REACH and other relevant regulatory compliance information

The COA shows the analysis results of a specific batch of BTA Benzotriazole. The TDS describes the general technical properties and recommended application areas of the product. The SDS contains information on safe use, transport, storage and emergencies.
These documents do not replace one another; they should be evaluated together.
In particular, when purchasing BTA, the supplier should be asked about the product's physical form, purity, melting point, moisture content and color value, because products with different dissolution behavior and appearance may be found under the same name of Benzotriazole.

STORAGE AND TRANSPORT OF BTA BENZOTRIAZOLE

BTA Benzotriazole should be stored under the conditions recommended by the manufacturer, in a cool, dry and well-ventilated area, in its tightly closed original packaging.
The product should not be exposed to high temperatures, direct sunlight, moisture or heat sources. Prolonged exposure to light and air may cause darkening of color; moisture uptake may lead to caking and loss of flowability.
BTA should be stored separately from strong oxidizing agents, strong acids and incompatible materials. Since the product may decompose at high temperatures, excessive heating and uncontrolled thermal processes should be avoided.
After the packaging is opened, it is important to protect the product from moisture, dust and contamination. Clean and dry equipment should be used during handling, and the packaging should be properly closed again.
Fine powder BTA may form a combustible dust-air mixture when dispersed in air. Therefore, prevention of dust accumulation, control of ignition sources and appropriate grounding measures should be taken into account. In the event of a spill, the cleanup procedures specified in the SDS should be applied without raising dust.
Products that have been stored for a long time, have changed color or have caked should be evaluated in accordance with the manufacturer's specifications.

SAFETY INFORMATION FOR BTA BENZOTRIAZOLE

The safe use of BTA Benzotriazole depends on the current SDS of the supplied product and the implementation of appropriate occupational safety measures.
1H-Benzotriazole may be harmful if swallowed or inhaled and may cause serious eye irritation. Supplier SDSs may include classifications such as acute toxicity, serious eye irritation and long-lasting harmful effects to aquatic life. Current hazard and precautionary statements should be checked in the supplier's SDS.
BTA Benzotriazole is a substance registered under the European Union REACH Regulation. Because it biodegrades slowly in the environment, the product is among the substances monitored in surface waters. Companies using and placing the product on the market should follow the applicable obligations and current regulatory status from the relevant official sources.
Dust formation and eye contact in particular should be avoided. Chemical-resistant protective gloves, eye protection, appropriate respiratory protection, work clothing and adequate ventilation should be used during weighing, transfer, dissolution and mixing operations. Local exhaust ventilation should be provided at points where dust is generated.
Contaminated clothing should be washed before reuse; in case of eye contact, the eyes should be rinsed with plenty of water for at least several minutes and medical attention sought if necessary.
Uncontrolled release of the product and BTA-containing wastewater into sewers, soil or surface waters should be prevented. Waste disposal should be carried out in accordance with local regulations and the methods specified in the SDS.
It should not be assumed that safety information for different manufacturers or different BTA forms is the same. The current SDS and the manufacturer's technical documentation should be taken as the basis.

WHAT SHOULD BE CONSIDERED WHEN PURCHASING BTA BENZOTRIAZOLE?

The first step in sourcing BTA Benzotriazole is to clarify for what purpose and in which system the product will be used. The quality criteria sought for cooling water treatment, antifreeze, metalworking fluid, detergent, VCI packaging or electronics applications may not be the same.
Therefore, specifying the application area, the desired physical form and the targeted technical performance in the purchase request, rather than writing only “BTA” or “Benzotriazole”, enables a more accurate product evaluation.

The following information should be clarified before purchasing:

Sector of use and final application

Requested product: Solid BTA or sodium benzotriazole solution

Requested physical form (powder, granules, flakes or needle crystals)

Required minimum purity

Required melting point range

Moisture and ash limits

Color and solution appearance requirements

Particle size requirements

Required quality standard

Manufacturer and origin information requirements

Required packaging type and quantity

TDS, SDS and COA needs

REACH and other regulatory compliance documents

If replacing an existing product, the technical properties of the existing product

The price of BTA Benzotriazole may vary according to product form, purity, origin, raw material costs, order quantity, packaging, logistics and current market conditions. Therefore, the current BTA price should be evaluated through a quotation together with the product specification and delivery terms.

BTA BENZOTRIAZOLE SUPPLY FROM ATAMAN KİMYA

BTA Benzotriazole is an important corrosion inhibitor evaluated for various technical functions in water treatment, antifreeze, metalworking fluids, detergent and packaging applications, such as copper corrosion inhibition, metal passivation, tarnish prevention and protection of mixed-metal systems. It is important that manufacturers planning to purchase the product clarify, before ordering, the BTA form, technical properties, quality grade and required documents appropriate to their application area.
Companies wishing to obtain information about BTA Benzotriazole supply from Ataman Kimya can share their application areas and technical requirements and request information on product suitability, current supply status, packaging options and price quotation.
The current stock status, origin, physical form, technical properties, packaging and specifications of the product should be confirmed with Ataman Kimya before ordering.

Sharing the following information in a quotation request facilitates the evaluation of the right BTA Benzotriazole product:

Sector of use and final application

Requested product type (solid BTA or sodium salt solution)

Requested physical form

Requested minimum purity and melting point

Formulation or process information used

Requested quality standard

Estimated order quantity

Desired packaging type

Requested technical documents

TDS or COA information of the existing product, if any

FREQUENTLY ASKED QUESTIONS ABOUT BTA BENZOTRIAZOLE

What is BTA Benzotriazole?
BTA Benzotriazole is a white to light cream-colored crystalline heterocyclic organic compound formed by the fusion of a benzene ring and a triazole ring. It is called Benzotriazole or BTA for short and is used particularly as a corrosion inhibitor for copper and copper alloys.

What does BTA stand for?
BTA is the common abbreviation of Benzotriazole. It is also referred to as Benzotriazol or 1H-Benzotriazole.

What is the CAS number of BTA Benzotriazole?
The CAS number for 1H-Benzotriazole is 95-14-7.

What is the EC / EINECS number of BTA Benzotriazole?
The EC / EINECS number for 1H-Benzotriazole is listed as 202-394-1.

What is the chemical formula of BTA Benzotriazole?
The molecular formula of BTA is C₆H₅N₃, and its molecular weight is approximately 119.12 g/mol.

Are BTA and Tolyltriazole (TTA) the same product?
No. Tolyltriazole is a separate azole inhibitor that carries an additional methyl group on the benzene ring and is structurally similar to BTA, but has a different CAS number and different physical properties.

What is the difference between solid BTA and Sodium Benzotriazole?
Solid BTA is pure 1H-Benzotriazole. Sodium benzotriazole is the salt form obtained by neutralizing BTA with sodium hydroxide and is generally supplied as an aqueous solution; its active content is lower and it is alkaline in character.

What is BTA Benzotriazole used for?
BTA is used to protect copper and copper alloys against corrosion in cooling water treatment, antifreeze and engine coolants, metalworking fluids, aircraft deicing fluids, detergents and VCI packaging.

In which sectors is BTA Benzotriazole used?
BTA can be used in the water treatment, automotive, metalworking, lubricant and functional fluid, aviation, detergent, packaging, paint and coating, electronics, photographic chemical and chemical synthesis sectors.

How does BTA prevent copper corrosion?
BTA bonds to copper(I) ions through the nitrogen atoms in the triazole ring and forms a water-insoluble, thin and persistent Cu(I)-BTA complex film on the copper surface. This film limits both anodic dissolution and cathodic oxygen reduction.

Which metals does BTA protect?
BTA is particularly effective for copper, brass, bronze and other copper alloys, as well as silver. For steel, cast iron and aluminum, it must be used together with additional inhibitors.

Is BTA soluble in water?
Yes. BTA dissolves in water at approximately 20 g/L at room temperature. Because it forms salts in alkaline media, its solubility increases markedly; it is also soluble in alcohols and glycols.

How much BTA is used in cooling water?
The amount used varies according to water chemistry, system type and biocide program. A maintenance dosage at low mg/L levels is generally applied; in new or cleaned systems a higher pre-passivation dosage may be used initially. The correct dosage should be determined through coupon tests and field monitoring.

Is BTA effective in chlorinated water?
Oxidizing biocides such as chlorine, hypochlorite and bromine can weaken the BTA film and increase azole consumption. In such systems, the dosage and biocide program should be planned together, and more halogen-resistant azoles should be evaluated if necessary.

Why is BTA used in antifreeze?
As part of the antifreeze inhibitor package, BTA helps protect copper and brass components in radiators, heater cores and fittings against corrosion.

Is BTA used in cosmetics or food?
Industrial BTA should not be used for cosmetic, food or pharmaceutical purposes. Compounds called benzotriazole encountered in these fields are generally derivatives with structures different from BTA.

Is BTA Benzotriazole a hazardous substance?
BTA may be harmful if swallowed or inhaled, may cause serious eye irritation and may be harmful to aquatic life. Therefore, appropriate protective equipment should be used during handling, and the current SDS should be taken as the basis.

Is BTA Benzotriazole registered under REACH?
1H-Benzotriazole is a substance registered under REACH. The current regulatory status and related obligations should be followed through official sources.

What does BTA look like physically?
BTA is generally a white to light cream-colored solid in the form of crystalline powder, granules, flakes or needle crystals.

What is the melting point of BTA?
The melting point of 1H-Benzotriazole is approximately in the range of 96–100 °C. Melting point is also a practical quality parameter used in purity control.

Why is the purity of BTA important?
Purity directly affects the protective effectiveness of the product, the solution color and its appearance in the formulation. The current value should be checked in the supplier's TDS and COA documents.

What does the price of BTA Benzotriazole depend on?
The price of BTA may vary according to product form, purity, origin, raw material costs, packaging, order quantity, logistics and market conditions.

Are there alternatives to BTA Benzotriazole?
Tolyltriazole, sodium benzotriazole, halogen-resistant azoles and 2-mercaptobenzothiazole can be evaluated as alternatives in certain applications. However, the choice of alternative should be made according to the targeted performance and the system.

How should BTA Benzotriazole be stored?
BTA should be stored in a cool, dry and well-ventilated area, in its tightly closed original packaging, away from heat and light sources, oxidizers and incompatible substances.

Which documents should be requested when purchasing BTA Benzotriazole?
TDS, SDS and COA are the basic documents. In addition, origin information and REACH and other relevant regulatory compliance information may be requested.

Which technical properties are important when purchasing BTA Benzotriazole?
Physical form, purity, melting point, moisture, ash, color, solution clarity, particle size and impurity content may be important depending on the intended use.

BTA BENZOTRIAZOLE – TECHNICAL SUMMARY

BTA Benzotriazole, called Benzotriazol in Turkish and BTA for short, is a white to light cream-colored crystalline heterocyclic organic compound with the formula C₆H₅N₃, formed by the fusion of a benzene ring and a triazole ring. It may be searched for under different names such as 1H-Benzotriazole, 1,2,3-Benzotriazole, Azimidobenzene and Copper Corrosion Inhibitor.
BTA Benzotriazole is not a single commercial product type. Although forms such as powder, granules, flakes and sodium salt solution are based on the same active structure, their active content, dissolution behavior and methods of use differ. Purity, melting point, moisture and color value are also important parameters affecting performance.
CAS No 95-14-7 and EC No 202-394-1 are used for 1H-Benzotriazole. Since the term “Benzotriazole” can evoke different compounds such as tolyltriazole, HOBt and benzotriazole-type UV absorbers, the full description and form of the product should be checked during purchasing.
BTA Benzotriazole is mainly used as a corrosion inhibitor for copper and copper alloys in water treatment, antifreeze and engine coolants, metalworking fluids, aircraft deicing fluids, detergents and VCI packaging. By forming a protective complex film on the copper surface, it helps prevent corrosion, control tarnishing and reduce metal ion release. Performance depends on BTA quality, dosage, water chemistry, other additives and system conditions.
For BTA, which may be harmful if swallowed or inhaled, has eye irritation potential and requires care with regard to the aquatic environment, appropriate occupational safety measures must be taken during handling and the current SDS must be taken as the basis. Selecting the right form and quality of BTA, which can be evaluated in water treatment, automotive, metalworking, detergent and packaging applications, is important for final product performance.
Companies planning to source BTA Benzotriazole from Ataman Kimya are advised to share their application area, requested product type and physical form, minimum purity, melting point, quality standard, quantity and technical document needs in order to confirm current product, stock, origin, packaging and quotation information.