SODIUM BISULPHITE

Sodium Bisulphite (NaHSO₃) is a chemical compound with strong reducing properties, primarily used as a preservative, antioxidant, and reducing agent. It is a white crystalline powder with a mild sulfurous odor, highly soluble in water, and widely employed across industries like food processing, pharmaceuticals, textiles, and water treatment.

Applications

1. Food and Beverage Industry

• Preservative: Prevents microbial growth and extends the shelf life of food products.
• Antioxidant: Used to prevent oxidation, retaining color and flavor in processed foods and beverages.
• Wine and Beer Making: Aids in sterilization and preservation by reducing oxidation and microbial activity.

2. Water Treatment

• Dechlorination: Removes excess chlorine from water after disinfection processes.
• Wastewater Treatment: Acts as a reducing agent to neutralize oxidizing agents like chlorine or bromine in effluents.

3. Textile and Leather Industry

• Bleaching Agent: Utilized for bleaching wool, silk, and jute.
• Dyeing Process: Helps in dye stabilization and ensures vibrant colors.

4. Pharmaceutical Industry

• Intermediate: Used in the synthesis of certain drugs.
• Preservation: Prevents oxidation in formulations requiring stability.

5. Pulp and Paper Industry

• Bleaching: Aids in removing residual chlorine during the pulp bleaching process.

6. Laboratories and Chemical Analysis

• Reducing Agent: Involved in reducing reactions and sample preparation for analytical purposes.

Safety and Handling

Hazards:

• Inhalation Risk: May cause respiratory irritation due to sulfur dioxide release.
• Skin and Eye Contact: Can lead to irritation or burns.
• Ingestion: Harmful if swallowed; may cause gastrointestinal distress.

Precautions:

• Personal Protective Equipment (PPE):
  • Use gloves, goggles, and protective clothing while handling.
  • Ensure adequate ventilation or use under a fume hood.
• Handling Guidelines:
  • Avoid inhaling dust or fumes.
  • Keep away from incompatible substances like strong oxidizing agents.
• Storage:
  • Store in a cool, dry, and well-ventilated place.
  • Ensure the container is tightly sealed to avoid moisture exposure.

First Aid Measures:

• Inhalation: Move to fresh air. If symptoms persist, seek medical advice.
• Skin Contact: Rinse with soap and water for 15 minutes. Remove contaminated clothing.
• Eye Contact: Flush eyes with water for at least 15 minutes. Seek immediate medical attention if irritation continues.
• Ingestion: Rinse mouth with water. Do not induce vomiting. Contact a healthcare professional immediately.

Disposal:

Dispose of Sodium Bisulphite in accordance with local regulations. Avoid releasing it into the environment.