Sulfur Metabisulphite

Sulfur metabisulfite is a chemical compound that is a white or yellowish crystalline powder. It is made by reacting sulfur dioxide with sodium carbonate or sodium hydroxide. It is often used as a preservative or antioxidant in foods.

Sulfur metabisulfite is added to foods to prevent spoilage by inhibiting the growth of bacteria and molds. It also helps to preserve the color and flavor of foods. It is commonly found in dried fruits, wine, and processed potatoes.

In the U.S., sulfur metabisulfite is generally recognized as safe (GRAS) by the FDA when used according to good manufacturing practices. It can cause allergic reactions in some individuals, particularly those with asthma. The Joint FAO/WHO Expert Committee on Food Additives (JECFA) and the European Food Safety Authority (EFSA) have evaluated sulfur metabisulfite and established acceptable daily intakes. Evidence on its long-term health effects at typical consumption levels is mixed, with some studies suggesting potential concerns while others find no significant risks.