Food Grade Sodium Bisulfite Chemical Formula: NaHSO? Molecular Weight: 104.06 CAS: 7631-90-5 Content: ≥98% Appearance: White crystalline powder Executive Standard: HG/T3492-80 Packaging: 25kg/bag Main Uses: Used for bleaching cotton textiles; serves as a reducing agent in industries such as dyes, papermaking, leather processing, and chemical synthesis; applied in the production of pharmaceutical intermediates, photographic developers, food bleaching agents, preservatives, antioxidants, and other related industries.