Preservative And Sodium Bisulfite

Sodium bisulfite is a chemical compound that is a salt of sulfurous acid. It is often produced industrially by treating sulfur dioxide with a solution of sodium carbonate or sodium hydroxide. It is commonly used as a preservative and antioxidant in various food products.

Sodium bisulfite is added to foods to prevent spoilage by inhibiting the growth of bacteria and molds, and to preserve color and flavor. It also acts as an antioxidant, preventing browning in fruits and vegetables and protecting fats and oils from becoming rancid. It is frequently found in dried fruits, wine, processed potatoes, and pickled vegetables.

In the U.S., sodium bisulfite is generally recognized as safe (GRAS) by the FDA when used according to good manufacturing practices. However, it can trigger allergic-type 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 sulfites, establishing acceptable daily intake levels. Some studies suggest potential adverse effects in sensitive individuals, but evidence at typical consumption levels is generally considered safe for the broader population.