SODIUM PYROSULFITE
CAS NO.: 7681-57-4
Molecular Formula Na2S2O5
Molecule Weight 190.10
Characteres: White or light yellow crystalline powder or small crystals, with a strong smell of SO2, specific gravity 1.4, soluble in water, acidic aqueous solution, contact with strong acid is released SO2 and generate the corresponding salts, for a long time in the air, is oxidized to Na2S2O6, so the product cannot be far.Higher than 150 degrees Celsius, namely decomposition of SO2.
Specification : (food grade)
| Item |
Standard |
| Purity (calculated with Na2S2O5) |
97%min |
| Iron (Fe) |
0.005%max |
| Arsenic (As) |
0.0002%max |
| PH value |
4.0-4.6 |
| Water insoluble matter |
0.05%max |
| Heavy metal(as Pb) |
0.001%max |
Package: 25kg net in PP bags with PE liner, or 1000kg net in ton bag
Application:
Bleach agent e.g.candies, cake, bamboo shoots, etc.
Loose agent e.g.bread, cracker etc.
Antiseptic and germicide e.g.fruit juice tinned food brews the cereals food is defended storage etc.
Inhibitor and freshen agent e.g. seafood fruit and vegetable etc.
Regulations in China can be used for the candied fruit, biscuits, sugar, crystal sugar, caramel, candy, glucose, liquid glucose, bamboo shoots, mushrooms and canned mushrooms, maximum usage of 0.45 g/kg.Candied fruit, bamboo shoots, mushrooms and canned mushrooms, grapes and blackcurrant juice concentrate of residues (SO2) is less than 0.05 g/kg;Biscuits, sugar, fans and other varieties of residual is less than 0.1 g/kg;The residues of liquid glucose may not be over 0.2 g/kg
Audited Supplier 
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