Other names: sodium hyposulfite, hyposulphite of soda Molecular formula: na2s2o3 molar mass: 158.09774 g/mol Appearance: white crystals Density and phase 1.667 g/cm³, solid Solubility in water Very soluble Melting point 48.3 c Boiling point N/a Basicity (pkb) N/a Properties: white crystal powder Items specification Na2s2o3•5h2o99.0% min Water-insoluble0.01% max Sulphide(as na2s++0.001% max Fe0.002% max Ph value++200g/l solution++6.5+9.5 Application: mainly used for medicine, glass, printing and dyeing, fertilizer, etc.. Packing: 25kg/bag pp/pe