Widely used as a corrosion inhibitor in industrial water treatment systems, especially in cooling towers and heating systems. It protects copper and copper alloy surfaces by forming a protective film that prevents oxidation and metal degradation. Commonly added to antifreeze and engine coolants to safeguard radiator and heater core components. Also found in hydraulic fluids and metalworking fluids to enhance equipment longevity. Its effectiveness in low concentrations makes it suitable for closed-loop systems where long-term protection is required. Compatible with various water chemistries and often used alongside other inhibitors for synergistic effects.