E557 · Anti-caking agents
Zinc silicate
Not authorised in AU-NZ and EU and US. No evidence of harm at dietary intake.
- Category
- Anti-caking agents
- Vegan
- Yes
- Vegetarian
- Yes
What it is
A synthetic or natural zinc mineral compound historically considered for use as an anti-caking agent.
How it is used in food
Intended to prevent powders from clumping.
Commonly found in- None (Banned)
Health and safety
No known risks at typical dietary levels.
Evaluated by food safety authorities and determined to be unsafe for general food use.
Regulatory status
| Region | Status | Notes |
|---|---|---|
| Australia & New Zealand FSANZ |
Not approved | Not approved for general food use or historically banned due to safety concerns. |
| European Union EFSA / European Commission |
Not approved | Not on the EU authorised list of food additives (Annex II). |
| United States FDA (Food and Drug Administration) |
Not approved | Not approved for general food use or historically banned due to safety concerns. |
Identification on labels
- E-number
- E557
Also printed asHemimorphite
Worth knowing
Zinc silicate occurs naturally as the mineral hemimorphite.
Conclusion
An unauthorized and potentially toxic mineral.
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Open the appEntry last reviewed 2026-08-05.
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