Sodium Metabisulphite - Industry/food

Physical and Chemical property: strong SO2 odour, proportion is 1.4, melting point >300℃, density 1.48
solubility: soluble in water ,alcohol, and acetone and in acidic solution, Na2S2O5+ strong acid →SO2+salt, Na2S2O5+O2→Na2S2O6, Na2S2O5(1500°C)→SO2 and others
Appearance:White crystalline

Usage:Used in rubber (concreting), printing and dyeing (threshing agent), organic synthesis, printing, the leather making, pharmacy, In food processing of bleaching agent and antiseptic, osteoporosis