Used primarily as a corrosion inhibitor in industrial water treatment systems, especially in cooling water and heating systems. It protects copper and copper alloy surfaces by forming a protective film that prevents oxidation and degradation. Also found in some metalworking fluids to enhance lubricity and prevent rust formation during machining operations. Additionally, it serves as an additive in antifreeze formulations to safeguard engine components. Its effectiveness at low concentrations makes it suitable for closed-loop systems where long-term metal protection is required.