Sodium metabisulfite--Haimen Wuyang Chemical Industry Co.,Ltd.

Inorganic chemical products: Sodium thiosulfate; Ammonium Thiosulphate; Potassium sulfite solution 45% (P; Ammonium bisulphite solution 70%; Sodium metabisulfite

Vat dyes and intermediates: Vat red F3B; Vat red 54#; Vat red FBM; Vat blue 66#; 1-nitro-2-methyl-anthraquinone

Pigment intermediates: 2B acid

Pharmaceutical intermediates: 3-Chlorophenol

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Sodium metabisulfite

1. Product description:
English name: Sodium Pyrosulfite;sodium pyrosulfite
CAS No.: 7681-57-4
Molecular formula: Na₂S₂O₅
Molecular weight: 190.09
Density 1.48。
White acicular crystal with strong SO₂ odor. Slightly soluble in alcohol. Melting point is 150℃.
2. Uses:
Sodium metabisulfite can be widely used in pharmaceutical industry, rubber industry, in bleaching leather, fabric and organic matter, or as mordant in printing and dyeing industry, etc.
3. Sodium metabisulfite:

Item		Index
Content	Na₂S₂O5%	> 98
Content	SO₂%	> 66
Thiosulfate	S₂O₃%	≤0.04
Iron	Fe %	≤0.0005
Heavy metal	Pb %	≤0.001

4. Hazardous characteristics:
Strong reducing property.
5. Notes:
Keep in cool, dry and well-ventilated warehouse. Keep away from fire and heat. Keep the container airtight. Separate from oxidants, acids, and edible chemicals.

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