Benzotriazole

Industrial Grade — Bulk supply across India & International Markets

What is Benzotriazole?

Benzotriazole (BTA) is a heterocyclic organic compound widely valued for its exceptional ability to inhibit corrosion on copper and copper alloy surfaces. It is a white to pale yellow crystalline solid that forms a thin, protective chemisorbed film on metal surfaces, effectively blocking the electrochemical processes that lead to corrosion and tarnishing. Beyond its corrosion-inhibiting properties, it also serves as an important chemical intermediate in the synthesis of UV light stabilisers used across various polymer and coating applications.

Polychem Industries supplies Benzotriazole to metalworking fluid manufacturers, anti-tarnish product formulators, and specialty chemical companies across India and internationally. Its unique effectiveness specifically on copper and copper-containing alloys makes it an essential additive in numerous industrial fluid formulations, coolants, and metal protection products where copper corrosion control is required.

Available Grades

GradeFormPurityStandardApplications
Industrial GradeWhite to pale yellow crystalline powder/flakes99%+ (Industrial Grade)IndustrialCorrosion inhibitors, metal cleaners, anti-tarnish agents, UV stabiliser synthesis

Applications & Uses

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Metalworking Fluids & Coolants

One of the most important applications. Benzotriazole is used as a corrosion inhibitor in metalworking fluids, cutting oils, and industrial coolants, particularly valuable for protecting copper, brass, and bronze components from corrosion during machining and processing operations.

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Anti-Tarnish Agents

Used in anti-tarnish formulations and coatings for silver, copper, and brass items, helping prevent the unsightly tarnishing and discoloration that occurs through oxidation and environmental exposure of these decorative and functional metal surfaces.

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Antifreeze & Coolant Formulations

Used as a corrosion inhibitor component in certain antifreeze and engine coolant formulations, helping protect copper and brass components commonly found in cooling system radiators and heat exchangers.

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UV Stabiliser Synthesis

Used as a key chemical intermediate in the synthesis of benzotriazole-based UV light stabilisers, which are widely used in plastics, coatings, and other polymer products to protect against UV-induced degradation and discoloration.

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Industrial Cleaning & Surface Treatment

Used in certain industrial cleaning and metal surface treatment formulations specifically targeting copper-containing equipment and components requiring corrosion protection during cleaning and processing operations.

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Photographic & Imaging Applications

Used in certain photographic processing chemistry applications, taking advantage of its specific chemical reactivity in image development and processing chemistry.

Technical Specifications

Benzotriazole — Key Properties

Chemical FormulaC6H5N3
CAS Number95-14-7
Molecular Weight119.13 g/mol
AppearanceWhite to pale yellow crystalline powder/flakes
Purity99%+ (Industrial Grade)
Melting Point98–100°C
Density / Bulk DensityBulk density: 0.5–0.7 g/cm3
pH5.0 – 6.0 (1% solution)
Packaging Available25 kg bags
StorageStore in cool, dry place away from moisture and direct sunlight. Stable under normal storage conditions.

Why Source Benzotriazole from Polychem Industries?

  • Industrial grade with full quality documentation
  • Specifically effective on copper and copper alloy corrosion protection
  • Certificate of Analysis and MSDS provided on request
  • Reliable bulk supply for metalworking fluid and anti-tarnish manufacturers
  • Competitive pricing with year-round availability
  • Export documentation experience for international shipments

Frequently Asked Questions

Why is Benzotriazole particularly effective on copper and copper alloys?
Benzotriazole has a specific molecular affinity for copper surfaces, forming a thin, tightly adsorbed protective film through chemisorption (a strong chemical bonding interaction with the metal surface). This protective film acts as a barrier that significantly slows the electrochemical corrosion processes that would otherwise affect unprotected copper, brass, and bronze surfaces, making it one of the most effective and widely used corrosion inhibitors specifically for these metals.
How is Benzotriazole used in UV stabiliser production?
Benzotriazole serves as a key building block in the synthesis of a class of UV light absorbers known as benzotriazole UV stabilisers. These compounds are incorporated into plastics, coatings, and other polymer products to absorb harmful UV radiation and convert it to harmless heat energy, protecting the polymer from UV-induced degradation, yellowing, and loss of mechanical properties over time.
What concentration of Benzotriazole is typically used in metalworking fluids?
Benzotriazole is typically used at relatively low concentrations in metalworking fluid formulations, often in the range of 0.1% to 1% depending on the specific fluid system and the level of copper corrosion protection required. The exact concentration depends on the formulation and the specific metals being protected in the application.
Do you export Benzotriazole outside India?
Yes. We export to Bangladesh, Sri Lanka, Nepal, Bhutan, and South Africa with full export documentation. Contact us for export pricing and lead times.

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