Sodium metabisulphite white or yellow crystalline powder or small
crystallization, with strong smell, a proportion of SO2, soluble in
water, 1.4 become acidic aqueous solution, and acid contact is
released and the generated corresponding salts SO2, long, the
oxidation air therein, so the product into Na2S2O6 cannot far.
Higher than 1500C, namely decomposition out SO2.
USES: chemical, pharmaceutical industry used in the production of
insurance powder, methyl pyrimidines, AnNaiJin sulfonamides 2,
etc), and chloroform caprolactam and styrene-acrylic sulphone and
benzaldehyde purification. Photographic industrial used the fuser
agent ingredients. Spices industrial used in the production of
vanillin. Used to brew industrial preservative, rubber after
concreting and cotton bleaching agent took off chlorine. Organic
intermediates, dye, leather used as electroplating industry,
reductant, wastewater treatment, and oil as of beneficiation agent.