HRK Intermediate
Sodium Metabisulphite
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Sodium Metabisulphite
Sodium metabisulfite (Na₂S₂O₅) is a widely used chemical in various industries due to its strong reducing and antioxidant properties. Here are some key details and industrial applications:
Chemical Properties:
- Chemical Formula: Na₂S₂O₅
- Molecular Weight: 190.10 g/mol
- Appearance: White or yellowish crystalline powder
- Solubility: Soluble in water, forming sodium bisulfite (NaHSO₃)
Industrial Uses:
Food and Beverage Industry:
- Preservative: Used to prevent microbial growth and oxidation in wines, beers, juices, and dried fruits.
- Bleaching Agent: Used in the processing of certain foods to preserve color.
Water Treatment:
- Chlorine Neutralizer: Used to remove chlorine and chloramine from drinking water and wastewater.
- Oxygen Scavenger: Prevents corrosion in boiler systems by removing dissolved oxygen.
Textile Industry:
- Bleaching and Dyeing: Acts as a reducing agent in the dyeing process and helps in bleaching wool and silk.
Photography:
- Developer Solutions: Used as a preservative in photographic developing solutions to prevent oxidation.
Mining and Chemical Manufacturing:
- Cyanide Detoxification: Used in the mining industry to neutralize cyanide waste.
- Reducing Agent: In chemical synthesis and processing.
Pharmaceutical Industry:
- Antioxidant: Used in pharmaceuticals to prevent oxidation of active ingredients.
Pulp and Paper Industry:
- Bleaching Agent: Used in the paper-making process to bleach wood pulp.
Safety Considerations:
- Handling: Sodium metabisulfite can cause irritation to the skin, eyes, and respiratory tract. Inhalation of dust should be avoided.
- Storage: It should be stored in a cool, dry place, away from moisture and acids.
Sodium metabisulfite’s multifunctional role as a preservative, reducing agent, and antioxidant makes it an essential chemical in these various industries.
