Used as an extreme pressure (EP) additive in lubricants, enhancing performance under high-load and high-temperature conditions. It improves wear protection and extends the life of mechanical components in automotive gear oils, industrial lubricants, and metalworking fluids. Also functions as a sulfur-based vulcanization accelerator in rubber processing, promoting cross-linking for better elastomer properties. Its reactivity makes it useful in organic synthesis for introducing disulfide linkages.