Sodium metabisulphite

Sodium metabisulphite

Disodium Metabisulfite; Sodium Pyrosulfite; Sodium Disulfite

CAS 7681-57-4

Chemical Formula Na₂S₂O₅

Molecular Weight 190.11 g/mol

MSDS Download

Sodium metabisulfite or sodium pyrosulfite is an inorganic compound. t decomposes when exposed to water or strong acids, releasing sulfur dioxide gas, which is responsible for its distinctive smell. Sodium Metabisulfite is known for its ability to prevent microbial growth and oxidation.

Industrial Uses

1. Food & Beverage

  • Preservative: Sodium metabisulphite is widely used as a preservative in foods like dried fruits, potato products, and fruit juices to prevent spoilage and browning.
  • Antioxidant: It acts as an antioxidant in food products, helping to maintain color and flavor, especially in processed and packaged foods.
  • Disinfectant: In brewing and winemaking, Sodium metabisulphite is used as a disinfectant to sanitize equipment and prevent microbial growth in beverages.
  • Antimicrobial Agent: It plays a crucial role in winemaking, where it is used to sterilize equipment and kill unwanted yeasts and bacteria during the fermentation process.
  • Preservation of Wine: Sodium metabisulphite helps preserve wine by preventing oxidation and maintaining flavor stability throughout storage and aging.

2. Oil & Gas

  • Drilling Fluids: Acts as a reducing agent in drilling fluids to control fluid viscosity and prevent oxidation.
  • Corrosion Prevention: Used in processes to inhibit corrosion in pipelines and equipment by neutralizing oxygen and oxidizing agents.

3. Paints & Coatings

  • Preservative: It helps in preventing the growth of microorganisms in water-based paints and coatings.
  • Antioxidant: Used in formulations to maintain the stability of colorants and extend the shelf life of coatings by reducing oxidation.

4. Cleaning & Disinfectants

  • Chelating Agent: Sodium metabisulphite is employed in industrial and household cleaning formulations to bind metal ions such as calcium and magnesium. This chelation helps prevent the formation of scale (hard water deposits), ensuring the cleaning agents can perform more effectively, particularly in hard water conditions.
  • Dechlorination: In cleaning applications, Sodium metabisulphite is also used to neutralize chlorine in water, making it suitable for cleaning delicate surfaces and equipment where chlorine might cause damage.

5. Water Treatment

  • Dechlorination Agent: Neutralizes chlorine and chloramine in water treatment systems to make water safe for consumption or industrial use.
  • Oxygen Scavenger: Removes dissolved oxygen in boiler feedwater, preventing corrosion in pipelines and equipment.

 

Specifications

Assay ≥ 96.5% (common industrial grade)
Appearance White to off-white crystalline powder
Odor Pungent sulfur odor
Boiling Point Decomposes before boiling
Melting Point 150°C (decomposes)
Density 1.48 g/cm³
Solubility Soluble in water (450 g/L at 20°C); insoluble in alcohols
Viscosity Not applicable (solid at room temperature)
Flash Point Non-flammable

Hazard Symbols

Corrosives
Irritants/Sensitisers/Other Hazards
Environmental Hazard

FAQs

1. What is the current price of  Sodium metabisulphite in India ?
The price of Sodium metabisulphite can vary based on factors such as purity, quantity, etc. For the most accurate and competitive pricing, please contact us at +91.979 979 2121 directly for a customized quote tailored to your needs.

2. Where can I buy Sodium metabisulphite in India ?
You can purchase Sodium metabisulphite from MULTICHEM, a leading importer with a reputation for quality and reliability. We provide convenient options for bulk orders and direct shipments across India. For more details on how to place an order, please visit our website or contact our sales team.

3. What is the minimum order quantity (MOQ) for Sodium metabisulphite ?
Our minimum order quantity (MOQ) for Sodium metabisulphite is designed to cater to both small-scale and large-scale needs. The MOQ depends on the packing size of the product which could range from 25 kg to 250kg.

4. How can I ensure the quality of Sodium metabisulphite supplied by Multichem ?
We adhere to stringent quality control processes to ensure that our products meet the highest standards of purity and effectiveness. They undergo rigorous testing and quality checks to guarantee that they comply with industry specifications. We provide a Certificate of Analysis (CoA) with every shipment to ensure transparency and quality assurance.