Sodium pyrosulfite

• Product NameSodium pyrosulfite
  CAS No.7681-57-4
  Purity97%min
  Min Quantity10000Metric Tons
  Price280~310
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  Molecular Structure

Detailed Description


1.Basic introduction:
Product name:Sodium metabisulphite
Other name:sodium metabisulfite,sodium pyrosulfite,sodium metabi, Pyrosulfurous acid, disodium salt
Appearance:snow white crystal powder or granular
Formular Chemical:Na2S2O5
Grade:both tech grade and food grade
Shelf life:Half one year
Quality standard:GB1893-1998
Supply ability:10000mt/year
Place of origin:China
2.Specification:

Item
Quality Index
Food Grade
Industry Grade
Purity ( As Na2S2O5)
98.0% min
97.0% min
Sulfur Dioxide( SO2)
65.0% min
65.0% min
Arsenic ( As )
0.0002% max
-
Heavy metals ( As Pb )
0.0005% max
-
Selenium (Se )
0.0005% max
-
Iron (Fe)
0.001% max
0.002% max
Water insoluble
0.02% max
0.05% max
PH value :
4.0-4.8
4.0-4.8


3.Package:

1>25kg double layer woven bag

2>25mt/27mt for a 20' foot container without pallet

3>Jumbo bags,palletize service,shipping marks can be discussed.
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• Sodium pyrosulfite