Sodium Bisulfite Chemical Formula: NaHSO? Molecular Weight: 104.06 CAS: 7631-90-5 Content: 98% min Appearance: White crystalline powder Executive Standard: HG/T 3492-80 Packaging: 25 kg/bag Main Applications: Used for bleaching cotton textiles; serves as a reducing agent in industries such as dyes, papermaking, leather processing, and chemical synthesis; also used in the production of pharmaceutical intermediates, photographic developers, food bleaching agents, preservatives, antioxidants, and other related industries.