... as antirust and corrosion inhibitor for metals(such as silver, copper, lead, nickel, zinc, etc.), widely used in the antirust oil ... products, as gas-phase corrosion inhibitor for copper and copper alloy, as treating agent for recirculating water, as antifreezer ... water system.Market exported: USA, Brazil,Korea, India etc. benzotriazole 99.8% Reach pre-registered