Sodium hydrosulfide for industrial use is an inorganic substance with the formula of NaHS, and it is colorless, transparent, and alkaline.32% sodium hydrosulfide is used as a promoter for the synthesizing of organic intermediates and preparation of sulfur dyes in the dye industry, copper beneficiation in the mining industry, and the preparation of fine chemicals, such as amino acid, mercaptopropionic acid, medicines, and pesticide intermediates, while high-concentration sodium hydrosulfide is mainly used as a material for preparing PPS plastics by polycondensation.