Sodium Metabisulphite (Na₂S₂O₅) is a high-quality chemical widely used as a preservative, antioxidant, disinfectant, bleaching agent, and reducing agent in food processing, water treatment, pharmaceuticals, textiles, leather processing, photography, and various industrial applications. It helps prevent oxidation, maintain product quality, and extend shelf life when used according to recommended guidelines and applicable regulations.

Specifications

Property	Details
Product Name	Sodium Metabisulphite
Chemical Formula	Na₂S₂O₅
CAS Number	7681-57-4
Molecular Weight	190.11 g/mol
Appearance	White to Slightly Yellow Crystalline Powder
Grade	Food Grade / Industrial Grade (Depending on Supplied Product)
Purity	Typically 97–99% (Depending on Manufacturer)
Odor	Characteristic Sulfur Dioxide Odor
Solubility	Soluble in Water
pH (Solution)	Slightly Acidic
Shelf Life	Usually 24 Months (Properly Stored)
Storage	Store in a Cool, Dry and Well-Ventilated Place