benzotriaol

Benzotriazole, commonly abbreviated BTA, is an organic compound belonging to the benzotriazole class of azole heterocycles. The most common form is 1,2,3-benzotriazole. Its molecular formula is C6H5N3, and it appears as a white to off-white crystalline solid with moderate melting behavior. It has limited water solubility but dissolves in many organic solvents.

In industry, benzotriazole is primarily used as a corrosion inhibitor for copper and its alloys, such as brass and bronze. It works by adsorbing onto metal surfaces and forming a protective film or complex that reduces oxidation and corrosion, especially in cooling systems, cleaners, lubricants, and coatings. It is also employed in some metal finishing processes and as an additive in various protective coatings and paints to help safeguard copper-containing components.

Benzotriazole can be used directly or in formulations that combine it with other inhibitors to enhance protection in aqueous systems. Derivatives of benzotriazole are also utilized as UV absorbers or stabilizers in certain polymer applications, reflecting the chemical versatility of the benzotriazole scaffold.

Safety and environmental considerations should be observed when handling benzotriazole. It can act as an irritant to skin and eyes, and exposure should be minimized. In the environment, benzotriazole is of concern due to its persistence in water and potential ecological effects; wastewater treatment can reduce some levels, but releases to aquatic systems are typically regulated. It is regulated under chemical safety frameworks in many regions, including regional safety programs and registrations.