Sodium Metabisulphite
Sodium Metabisulphite is a white crystalline powder with a pungent sulfur dioxide odor. It is widely used as a preservative, antioxidant, and disinfectant in food, water treatment, and pharmaceuticals. The chemical also finds applications in textiles, mining, and photography due to its strong reducing properties.
Synonyms
Sodium Pyrosulfite, Disodium Pyrosulfite, Pyrosulfurous Acid, Disodium Salt, Sodium Disulphite, SMBS
Formula
Na₂S₂O₅
CAS No
7681-57-4
HS Code
28321090
Industries Served
- Food and Beverage Industry
- Chemical Industry
- Textile Industry
- Photography
- Pharmaceutical Industry
- Water Treatment
- Mining Industry
- Pulp and Paper Industry
- Cosmetics and Personal Care
- Textile Industry
Applications
- Acts as a preservative and antioxidant (E223) in processed foods.
- Prevents browning in dried fruits, juices, and beverages.
- Used in wine and beer making to control microbial growth and oxidation.
- Removes chlorine and dissolved oxygen from wastewater and drinking water.
- Applied in boiler water treatment to prevent corrosion.
- Employed as a purifying agent in antibiotic production.
- Used as a conservant in medicines and formulations.
- Sometimes used in photographic developers and medical disinfectants.
- Functions as a bleaching agent for wool, silk, and jute.
- Helps in dyeing and printing processes as a reducing agent.
- Used in ore flotation (e.g., gold extraction) to prevent oxidation.
- Serves as a reducing agent in various chemical processes.
- Utilized in fixing baths to prevent oxidation of developing solutions.
- Applied in the tanning process for hides and skins.
