Customization: | Available |
---|---|
CAS No.: | 7681-57-4 |
Formula: | Na2s2o5 |
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Premium and Economical Sodium Metabisulfite Food Preservatives
Sodium Metabisulfite Sodium Metabisulfite is presented as a white or yellow crystalline powder or small crystal, distinguished by its strong SO2 odor. It has a specific gravity of 1.4 and is water-soluble, with its aqueous solution being acidic. Upon contact with strong acids, it liberates SO2, forming the corresponding salt. When exposed to air, it undergoes oxidation. The chemical identity is Na2S2O5, necessitating careful storage to prevent prolonged exposure. Above 150 degrees Celsius, it undergoes decomposition, releasing SO2.
INDEX OF SODIUM METABISULFITE |
CONTENT |
|
FOOD GRADE |
INDUSTRIAL GRADE |
|
PURITY (AS NA2S2O5) |
97%MIN |
96%MIN |
SO2 |
65.0%MIN |
65%MIN |
AS |
0.0002% MAX |
- |
HEAVY METALS (AS Pb) |
0.0005% MAX |
- |
SE |
0.0005% MAX |
- |
IRON (Fe) |
0.001% MAX |
0.002% MAX |
WATER TREATMENT |
0.02% MAX |
0.05% MAX |
PH VALUE |
4.0-4.8 |
4.0-4.8 |
PURITY (AS NA2S2O5) |
97% MIN |
96% MIN |
1) Food Grade Applications: Serving as a bleach agent in products such as candies, cakes, and bamboo shoots. It is also employed as a loosening agent in bread and crackers. Additionally, it functions as an antiseptic and germicide in fruit juices, tinned foods, and stored cereal foods. Furthermore, it acts as an inhibitor and freshening agent for day lilies, seafood, fruits, and vegetables.
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