Used as a curing agent for high-performance epoxy resins, particularly in aerospace and electronic applications due to its ability to form thermally stable and mechanically strong networks. Also employed in the synthesis of advanced polymers and polyimides where heat resistance and durability are critical. Its sulfur-containing structure contributes to flexibility and crack resistance in cured resin systems. Additionally, it serves as an intermediate in the production of dyes and specialty chemicals requiring sulfide linkages.