Ingredient · E220

Prepared With Sulfur Dioxide

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Source
Not animal-derived
Allergen
No
Role in food
Sulfur dioxide and its salts (sulfites) are commonly used as preservatives in dried fruits, …

What it is

Sulfur dioxide is a gas that occurs naturally in small amounts. It is often produced industrially by burning sulfur. In food, it is typically used in the form of sulfites, which are salts containing sulfur dioxide.

Why it's used

Sulfur dioxide and its salts (sulfites) are commonly used as preservatives in dried fruits, wines, and processed meats. They prevent spoilage by inhibiting the growth of bacteria, yeasts, and molds. They also act as antioxidants, preventing browning in fruits and vegetables.

Health notes

Sulfur dioxide is approved by the FDA as a food additive and is generally recognized as safe (GRAS) when used according to good manufacturing practices. However, some individuals, particularly those with asthma, may be sensitive to sulfites and experience allergic-type reactions. The Joint FAO/WHO Expert Committee on Food Additives (JECFA) and the European Food Safety Authority (EFSA) have evaluated sulfites, and regulatory bodies continue to monitor their use and safety.

Allergen info

Sulfur dioxide itself is not one of the 9 FDA major allergens. It does not contain gluten.

Products containing Prepared With Sulfur 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.