Used primarily as a corrosion inhibitor in cooling water systems and antifreeze formulations, especially for copper and its alloys. It protects metal surfaces by forming a protective film that prevents oxidation and degradation. Commonly found in hydraulic fluids, lubricants, and metalworking fluids to enhance equipment longevity. Also serves as an additive in some photographic developers and UV stabilizers due to its ability to absorb ultraviolet light. Its structural analogs are used in pharmaceuticals, but this compound itself is mainly industrial.