Used primarily as a corrosion inhibitor in lubricants and metalworking fluids. It protects copper and its alloys from degradation caused by oxidation and acidic byproducts, especially in automotive and industrial engine oils. Also functions as an additive in greases and hydraulic fluids to enhance equipment longevity. Shows effectiveness in preventing tarnish and wear in mixed-metal systems. Its stability under high temperatures makes it suitable for use in internal combustion engines and transmission systems.