... powder or small crystallization, with strong smell, a proportion of SO2 1.4, soluble in water, become acidic aqueous ... long for air, is oxidized to Na2S2O6, reason this product not far. Above 1500C, namely the SO2 decomposition.Use: ... the leather making, pharmaceutical and other department. In food processing of bleaching agent and antiseptic, osteoporosis agent.Details: Test itemSpecificationReagent ...