Calcium silicate
Anti-caking mineral.
- Vegan
- Yes
- Vegetarian
- Yes
What it is
A naturally occurring silicate or magnesium mineral used primarily to prevent powders from clumping together.
How it is used in food
Prevents clumping in salt and powdered mixes by absorbing moisture.
Commonly found in- Chewing gum
- Spices
- Grated cheese
- Wine clarification
Health and safety
None known. Silicates of this kind are inert and are not absorbed from the gut; they pass through unchanged.
EFSA identified no safety concern for calcium silicate at reported use levels.
Regulatory status
| Region | Status | Notes |
|---|---|---|
| Australia & New Zealand FSANZ |
Permitted | Permitted under the FSANZ Food Standards Code. |
| European Union EFSA / European Commission |
Permitted | Authorised for food use under EU regulations (Annex II). |
| United States FDA (Food and Drug Administration) |
Permitted | Authorised for food use by the FDA (often GRAS for standard additives). |
Identification on labels
- E-number
- E552
Worth knowing
Naturally occurs as the mineral wollastonite.
Conclusion
Calcium silicate is a limited concern that is safe at standard use levels. This mineral is chemically inert and cannot be absorbed by the digestive tract, simply passing through unchanged after absorbing moisture in spices and grated cheese. EFSA identified no safety concerns for its use in food.
References
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Open the appEntry last reviewed 2026-07-28.
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