Ingredient · E551

Silicondioxide

Source
Not animal-derived
Allergen
No
Role in food
Manufacturers add silicon dioxide as an anti-caking agent to prevent powdered foods from clumping. …

What is Silicondioxide?

Silicon dioxide, also known as silica, is a naturally occurring compound found in sand and quartz. It is manufactured industrially by reacting silicon with oxygen at high temperatures or by precipitating it from a solution of sodium silicate.

Is Silicondioxide vegan?

Silicondioxide is not animal-derived. Products that contain it can still include other animal-derived ingredients, so check the full ingredient list.

Is Silicondioxide a major allergen?

Not a major allergen.

What is Silicondioxide used for?

Manufacturers add silicon dioxide as an anti-caking agent to prevent powdered foods from clumping.

Is Silicondioxide safe?

Silicon dioxide is generally recognized as safe (GRAS) by the FDA for use as an anti-caking agent.

Why it's used

Manufacturers add silicon dioxide as an anti-caking agent to prevent powdered foods from clumping. It helps maintain a smooth texture in products like cake mixes, spice blends, and powdered beverages.

Health notes

Silicon dioxide is generally recognized as safe (GRAS) by the FDA for use as an anti-caking agent. It passes through the digestive system largely unabsorbed. JECFA and EFSA have evaluated silicon dioxide and found it to have no safety concerns at typical intake levels.

Allergen info

Not a major allergen.

Foods that contain Silicondioxide

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Last updated: October 5, 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.