Inorganic Salts
Sodium Metabisulfite, 98%
Food-grade fine crystal used as a preservative and antioxidant.
- Article code
- SMBS1
- CAS
- 7681-57-4
- Grade
- Food Grade, Fine Crystal
- Category
- Inorganic Salts
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Properties
- Article / SKU
- SMBS1
- CAS Number
- 7681-57-4
- Chemical Formula
- Na2S2O5
- Grade
- Food Grade, Fine Crystal
Packaging options
- 10 Lbs
- 1 Lb
- 2 Lbs
- 50 Lbs
- 5 Lbs
Details
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.
Bleaching agent
Chlorine removal
Biostatic agent
Toxic by inhalation. Tolerance limit: 5 mg per cubic meter of air.
Pyrosulfurous acid, disodium salt; Sodium Pyrosulfite; Disodium Salt Pyrosulfurous Acid; Sodium disulfite; Disodium disulfite; Disulfurous
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