DOSS is a kind anionic surfactant, have good wettability, permeability, emulsibility and foamability. DOSS not able to bear strong acid, strong alkali, heavy metallic salt and reductant etc. As emulsifier, detergent and penetrating agent in textile industry; As surfactant in cosmetics industry; As surfactant and leveling agent in printing and dyeing industry; As lubricant in Aerosol OT; As emulsifier in pesticide and photosensitive materials