Is Silicon Dioxide vegan?
Silicon Dioxide
Vegan
Vegan
Vegetarian
Vegetarian
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 vegan if it contains no animal-derived components at any point in its production.
Classifications are made to the best of our knowledge based on available scientific and regulatory sources. We cannot guarantee the accuracy of every entry, errors in the sources we draw from can always occur. This tool also cannot account for cross-contamination, which depends entirely on individual suppliers and producers. If you believe a classification is incorrect, you can report an issue.
