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Is Silicon Dioxide vegetarian?

Silicon Dioxide

Vegetarian Vegetarian
Vegan Vegan

Silicon dioxide (silica) is a naturally occurring mineral compound composed of silicon and oxygen. It is widely used in food and cosmetics as an anticaking agent, thickener, and carrier for flavourings.

Also known as Amorphous silica, Amorphous silicon dioxide, Colloidal silica, Fumed silica, Hydrous Silica, Quartz, Silica, Silicic Acid, Silicon(IV) oxide
INCI name Silicon Dioxide
E number E551
INS number 551
CAS number 7631-86-9
EC number 231-545-4
CosIng ID 78845
Last reviewed 22 April 2026

An ingredient is considered vegetarian if it avoids components derived from killing an animal.

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