Sodium Metabisulfite

Sodium metabisulfite is a chemical compound with the formula Na₂S₂O₅. It commonly appears as a white, crystalline or powdery solid that is soluble in water.

Uses

• Preservative: Used in food and beverages to prevent spoilage and oxidation.
• Sanitizer: Often employed to clean equipment in winemaking and brewing.
• Bleaching Agent: Used in the paper, textile, and pulp industries.
• Antioxidant: Helps prevent browning and spoilage of foods.

Safety

Some individuals may be sensitive to sodium metabisulfite, experiencing allergic reactions such as asthma-like symptoms. Proper handling and storage are important since it can release sulfur dioxide gas, which is irritating to the respiratory system.

Chemical Properties

• Chemical formula: Na₂S₂O₅
• Molar mass: 190.1 g/mol
• Appearance: White or yellowish powder