Ingredient · E222

Sodium Bisulfite

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Source
Not animal-derived
Allergen
No
Role in food
Sodium bisulfite is added to foods to prevent browning, inhibit the growth of bacteria …

What it is

Sodium bisulfite is a chemical compound made from sulfur dioxide and sodium hydroxide. It is a white crystalline powder that dissolves in water. It is often used as a preservative and antioxidant.

Why it's used

Sodium bisulfite is added to foods to prevent browning, inhibit the growth of bacteria and yeast, and act as a bleaching agent. It is commonly found in dried fruits, processed potatoes, wine, and some baked goods.

Health notes

Sodium bisulfite is generally recognized as safe (GRAS) by the FDA when used according to good manufacturing practices. It can cause allergic-type reactions in some individuals, particularly those with asthma. The Joint FAO/WHO Expert Committee on Food Additives (JECFA) has evaluated sodium bisulfite and established an acceptable daily intake. Evidence regarding its long-term health effects at typical consumption levels is mixed, with some studies suggesting potential concerns and others finding no significant issues.

Allergen info

Sodium bisulfite is not derived from any of the nine FDA major allergens. It does not contain gluten.

Products containing Sodium Bisulfite

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Last updated: September 28, 2026

Note: This site presents label data from USDA FoodData Central for general information. It is not medical advice. Check the package label; formulations change.