Benzotriazole

Benzotriazole (CAS 95-14-7, EC 202-394-1, formula C6H5N3) is a heterocyclic compound commercially available under trade names including COBRATEC 99 and AKOS 92210, and also referenced as azimidobenzene or aziminobenzene. It carries no assigned E-code. The compound is classified under HS code 29339990 for customs purposes.

In water treatment and metalworking fluids, benzotriazole functions as a copper and copper-alloy corrosion inhibitor by forming a stable, chemisorbed protective film on metal surfaces, blocking oxidative attack. In lubricant formulations, it acts simultaneously as an antioxidant and metal deactivator, extending fluid service life in automotive and industrial gear systems.

Benzotriazole is supplied in powder, granule, crystal, needle, and flake forms to suit different dosing and dissolution requirements. It is subject to REACH registration obligations within the EU. Procurement teams should confirm supplier SDS documentation and purity grade specifications prior to sourcing for sensitive applications such as electronics or closed-loop water systems.