Ingredient · E220

Sulphure Dioxide

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Source
Not animal-derived
Allergen
No
Role in food
Sulfur dioxide and sulfites are used in foods to prevent spoilage by inhibiting the …

What it is

Sulfur dioxide is a gas that occurs naturally in small amounts but is often produced industrially. It is made by burning sulfur or by heating metal sulfides. It is commonly used in food as a preservative.

Why it's used

Sulfur dioxide and sulfites are used in foods to prevent spoilage by inhibiting the growth of bacteria and mold. They also act as antioxidants, helping to preserve color and flavor. They are often found in dried fruits, wine, and processed potatoes.

Health notes

Sulfur dioxide is approved by the FDA as a food additive, primarily as a preservative. Some individuals, particularly those with asthma, may be sensitive to sulfites and experience allergic-type reactions. Regulatory bodies like JECFA and EFSA have evaluated sulfites, and their use is permitted within specified limits. Evidence regarding widespread adverse effects in the general population at typical intake levels is mixed.

Allergen info

Sulfur dioxide is not derived from any of the 9 FDA major allergens. It does not contain gluten.

Products containing Sulphure Dioxide

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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.