Sodium Bisulfite Molecular Formula: NaHSO3 Appearance: White Monoclinic crystal powder, with strong SO2 smell. It is easy to solve in water to form acidic solution and disintegrate when heated, and slightly soluble in ethanol. Specification: 1)NaHSO3:99%min 2)Fe:0.003%max 3)Water insoluble matter:0.04%max Application: It is widely used for decolorization agent.