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Sodium metabisulfite is white or yellow crystalline powder or small crystals, with a strong smell of SO2, the proportion of 1.4, soluble in water, acidic aqueous solution, with a strong acid contact with the release SO2 and generate the corresponding salts, long home air, the oxidation into Na2S2O sodium metabisulfite is white or yellow crystalline powder or small crystals, with a strong SO2 odor, specific gravity 1.4, soluble in water, acidic aqueous solution, with a strong acid contact with the release SO2 and generate the corresponding salts, long home air, the oxidation of Na2S2O4, so the product can not go far. Higher than 1500C, decomposition of SO2.
Uses: used for printing and dyeing industry, organic synthesis, printing, leather, pharmaceutical and other sectors; as a preservative, bleach, loose 6 in food processing, so the product can not go far. Higher than 1500C, decomposition of SO2.
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