Ingredient · E222

Sodium Bisulfites

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Source
Not animal-derived
Allergen
No
Role in food
Sodium bisulfite is used as a preservative and antioxidant in many foods. It helps …

What it is

Sodium bisulfite is a chemical compound that is a salt of sulfurous acid. It is typically produced by reacting sulfur dioxide with a sodium base, like sodium hydroxide or sodium carbonate. It appears as a white crystalline powder.

Why it's used

Sodium bisulfite is used as a preservative and antioxidant in many foods. It helps prevent spoilage by inhibiting the growth of bacteria and fungi, and it also prevents browning in fruits and vegetables. It is commonly found in dried fruits, wine, and processed potatoes.

Health notes

In the United States, sodium bisulfite is generally recognized as safe (GRAS) by the FDA when used according to good manufacturing practices. It is known to cause 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, and established acceptable daily intakes. Evidence regarding other health effects at typical consumption levels is mixed.

Allergen info

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

Products containing Sodium Bisulfites

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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.