Metabisulfite

Metabisulfite or metabisulphite is a type of sulfite used primarily as a food preservative. It is also used in the pharmaceutical industry and in wine making.

Chemical Properties

Metabisulfite is an inorganic compound that is typically available in a white or yellowish powder form. It is soluble in water and its chemical formula is M2S2O5, where M represents a metal ion such as sodium or potassium.

Uses

Food Industry

In the food industry, metabisulfite is used as a preservative and antioxidant. It helps to prevent the growth of microorganisms and maintains the color of food products. It is commonly used in dried fruits, wines, and molasses.

Pharmaceutical Industry

In the pharmaceutical industry, metabisulfite is used as an excipient. It acts as an antioxidant in some injectable medicines to maintain their stability and efficacy.

Wine Making

In wine making, metabisulfite is used as a sterilizing agent. It prevents the growth of unwanted bacteria and yeasts, and protects the color and flavor of the wine.

Health Effects

While metabisulfite is generally safe for consumption, some individuals may have an allergy or sensitivity to sulfites. This can cause symptoms such as skin rash, hives, swelling, stomach pain, and in severe cases, anaphylaxis.

See Also

• Sulfite
• Food preservative
• Pharmaceutical industry
• Wine making