Silica aerogel
Silica aerogelSilica aerogel is an anticaking agent and defoamer. The material is almost entirely air — the lightest solid in ordinary use — which is what gives it its enormous capacity to absorb moisture.
Where it is and isn’t permitted
| Jurisdiction | Status | Scope and limits | Citation |
|---|---|---|---|
| United States | Permitted | 21 CFR 182.1711retrieved 2026-09-07 | |
| Codex Alimentarius | Not listedDoes not appear on this jurisdiction’s permitted list. That is not the same as being prohibited. |
What it is made from
Produced by forming a silica gel and drying it so the structure does not collapse, leaving a very open solid.
- Vegan
- Vegetarian
Every name it appears under
1 recorded name. A label may use any of them.
As it appears in regulation
- Silica aerogel
Hazard reference values
No reference value for this substance in the sources we hold.
Evidence and how bodies read it
Studies, and the differing conclusions regulators drew from them, are curated by hand rather than machine-read, and none has been written for this substance yet.
Sources for this page
- ecfr retrieved 2026-09-07
Full licence terms and publisher details on Sources. How this page is built and updated: Method.
Machine-readable:/api/v1/additives/silica-aerogel.json