Sodium Sulphite, white powder or small crystal, mainly used in pulp and paper industry Sodium Sulphite, white powder or small white crystal. It is mainly used in pulp and paper industry, tannage and medicine etc.Molecular formular: Na2SO3Purity: 98%min, 97%min, 96%minCAS NO.: 7757-83-7Package: 25kg plastic weaving bagQuantity/fcl: 25mtsEINECS NO.: 231-821-4 sodium sulphite anhydrous 98%