Sodium benzotriazole

Sodium benzotriazole (CAS 15217-42-2), also known commercially as sodium benzotriazolide, is a water-soluble corrosion inhibitor and metal deactivator.

Where is Sodium benzotriazole used?

• Metalworking and industrial lubricants: incorporated into cutting fluids, hydraulic oils, and rust-preventive formulations to protect copper alloy components during machining and storage
• Water treatment: inhibits copper corrosion in cooling tower circuits and closed-loop systems
• Electronics manufacturing: surface passivation agent during PCB processing and metal finishing, preventing tarnish on copper traces and contacts
• Automotive antifreeze and coolant formulations protect brass and copper radiator components under high-temperature operating conditions.

Commercial specifications

• Solution concentrations typically 40% to 50%
• Technical grade standard; high-purity grades for electronics and precision industrial applications
• Packaged in drums or IBCs