1,2,3-Benzotriazole CAS 95-14-7 nitrogen heterocyclic additive for metal protection Product Overview 1,2,3-Benzotriazole (BTA), CAS 95-14-7, is a nitrogen-containing aromatic heterocyclic compound. It can build a compact protective layer on copper and copper alloy surfaces to slow corrosion. It also features UV absorption capacity to retard polymer aging. This substance is widely adopted in water treatment, lubricant and polymer stabilization sectors. Product Properties It