Colorless and tasteless transparent liquid, has reductibility 1, Chemical name:Potassium sulfite solution 2, Molecular formula: K2SO33, Molecular weight: 1584, Properties: ... °C)9.0-9.5Fe, w/w ≤0.001%Sulfate (K2SO4),w/w ≤0.7%Thiosulfate(S2O32-),w/w≤0.006 ... printing industry and the bleaching agent of wool and silk. . Potassium sulfite