Sodium Benzotriazole 40% Solution, or BTA40, is a colorless-to-pale yellow, liquid of 40% Sodium Benzotriazole Solution in water represented by the formula: (C6H4N3Na). BTA40 is commonly used as a corrosion inhibitor for yellow metal protection in cooling tower products, engine coolants, metal working fluids, inks and cleaners. The solution is soluble in water, benzene, toluene, chloroform, and miscible with lower alcohol and ethylene glycol.
Sodium benzotriazole can be absorbed on the metal surface and form a thin film to protect copper and other metals. BTA·Na can be used together with many scale inhibitors and fungi disinfectants in circulating cool water system. And sodium benzotriazole has good corrosion inhibition effect in circulating cool water system. The dosage of 2-4 mg/L is preferred. Sodium benzotriazole can also be used as an anti-discolor agent, coating additive, and lube oil additive.
