Metabisulfite of Sodium

Metabisulfite of sodium, also known as sodium metabisulfite, is a chemical compound with the formula Na₂S₂O₅.

It appears as a white, crystalline or powdery solid and has a strong odor similar to sulfur dioxide. Sodium metabisulfite is highly soluble in water and releases sulfur dioxide gas when dissolved.

Common Uses

• As a food preservative (E223), especially for dried fruits and wines
• In water treatment to remove chlorine
• As an antioxidant and antimicrobial agent
• In the textile and paper industries for bleaching
• In laboratories as a reducing agent

Chemical Properties

• Chemical formula: Na₂S₂O₅
• Molar mass: 190.1 g/mol
• Appearance: White crystalline solid

Health and Safety

• Can cause allergic reactions in some individuals, especially those with asthma
• Should be handled with care and kept away from acids (releases toxic sulfur dioxide gas)
• Can cause irritation to skin, eyes, and respiratory system if inhaled

In summary, sodium metabisulfite is a versatile chemical widely used in various industries but should be handled cautiously due to potential health risks.