Sodium Metabisulfite Formula

The chemical formula for sodium metabisulfite is Na2S2O5. It is a white or yellowish powder that is soluble in water and commonly used as a food preservative, antioxidant, and reducing agent in various industries such as pharmaceuticals, textile, and water treatment. Sodium metabisulfite undergoes decomposition when exposed to heat and acids, releasing sulfur dioxide gas. It should be handled with care as it can cause skin and eye irritation, and respiratory problems if inhaled in high concentrations.