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Appearance: | White crystalline powder |
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CAS No.: | 7681-57-4 |
Molecular Formula: | Na2s2o5 |
EINECS: | 231-673-0 |
Purity: | 98% |
Certification: | ISO,SGS,HALAL,FDA |
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Product Name: Sodium Metabisulfite
CAS No.: 7681-57-4
Formula: Na2s2o5
EINECS: 231-673-0
M.F.:Na2S2O5
Appearance:White crystalline powder
Specification:98%
Specification
Item | Food Grade | Industry Grade |
Purity ( As Na2S2O5) | 98.0% min | 96.0% 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 |
Remark : | Conformed with FCCV and E223 Standard |
Sodium metabisulfite is a white or yellow crystalline powder or small crystal with a strong SO2 odor, a specific gravity of 1.4, soluble in water, and the aqueous solution is acidic. When it is in contact with a strong acid, it releases SO2 to form a corresponding salt. When it is left in the air, it oxidizes. It is Na2S2O6, so the product cannot be stored for a long time. Above 150 degrees Celsius, SO2 is decomposed.
Applications:
1 Used in wide range of industrial and municipal waste water treatment.
2 Used in pulp and paper making.
3 Used in mining industry.
4 Used in production of cleaning agents, detergents ans soaps.
5 Used in sterilizing the equipment in beer and wine manufacturing.
6 Used in water reducing agent for concrete admixture in construction industry.
7 Used in dye industry.
8 Used in oil field production and disinfection.
9 Used in removal of tree stumps in landscape gardening.
10 Used in water treatment in leather tanning process.
11 Used in food preservative for dried foods
Packing:
plastic woven bag with PE liner.Other package sizes are available upon request.
Storage:
Store in a cool, dry, ventilated environment.
Shelf life:
2years
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