Sodium Metabisulfite, 98%
Food-grade fine crystal used as a preservative and antioxidant.Sodium Metabisulfite, 98%
Sodium metabisulfite (SMBS) is commonly used for removal of free chlorine and as a biostatic. Other chemical reducing agents exist (e.g., sulfur dioxide), but they are not as cost-effective as SMBS. When dissolved in water, sodium bisulfite (SBS) is formed from SMBS: Na2S2O5 + H2O → 2 NaHSO3, then reduces hypochlorous acid according to: 2NaHSO3 + 2HOCl → H2SO4 + 2HCl + Na2SO4. In theory, 1.34 mg of sodium metabisulfite will remove 1.0 mg of free chlorine. In practice, however, 3.0 mg of sodium metabisulfite is normally used to remove 1.0 mg of chlorine.
Product Specifications
CAS Number | 7681-57-4 |
Chemical Formula | Na2S2O5 |
Grade | Food Grade, Fine Crystal |
Applications and Benefits:
- Preservative
- Antioxidant
- Bleaching agent
- Chlorine removal
- Biostatic agent
Caution:
Toxic by inhalation. Tolerance limit: 5 mg per cubic meter of air.
Synonyms:
Pyrosulfurous acid, disodium salt; Sodium Pyrosulfite; Disodium Salt Pyrosulfurous Acid; Sodium disulfite; Disodium disulfite; Disulfurous
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MSDS_Sodium_Metabisulfite.pdf