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Sodium Meta Bi Sulphite
Sodium Meta Bisulphite (Sodium Metabisulphite)
Product Overview & Specifications
Sodium Metabisulphite (Na₂S₂O₅) is a white to yellowish crystalline powder or granules. It typically has purity in the range of 95–99 %. It releases sulfur dioxide upon dissolution and decomposes under acidic conditions. It is soluble in water (about 430 g/L at 20 °C) and acts as a reducing agent and preservative / antioxidant.
Functionality & Mechanism
Sodium metabisulphite acts as a strong antioxidant, anti‑microbial, bleaching agent, dechlorinator, and reducing agent. The active species is SO₂ / bisulfite ions, which can scavenge oxygen, inhibit enzymatic browning, and act as a sterilant.
Uses / Applications
- Food & Beverage: Used (in some countries, subject to legal limits) in wine-making, fruit processing, as sulfiting preservative, to prevent browning.
- Water Treatment: As a de-chlorinator, removing residual chlorine before discharge or further treatment.
- Pulp & Paper: As a bleaching / reducing agent.
- Photography / Lab: In photographic developers or laboratory reducing systems.
- Textile & Leather: As antioxidant, bleaching aid, or for dechlorination in dye baths.
Why Rishi Chemtrade is a Strong Manufacturer for It
- Food & Pharma Chemical List: They list sodium meta bisulphite among their food & pharma chemical offerings.
- Technical Expertise with Sulphur Compounds: Their capability to handle sulfurous reagents, ensure controlled environment, and manage stability is critical.
- Quality & Purity Control: They can guarantee low levels of sulfite, controlled moisture, residual sulfur dioxide content, and absence of undesirable byproducts.
- Global Export Capability: They can manage packaging in sulfur-resistant materials, proper labeling, and transportation regulations.
- Customer Reliance: Many clients require consistent specification over long contracts; Rishi Chemtrade’s track record aligns with that requirement.