Aluminium ammonium sulphate
Avoid to limit unnecessary exposure to dietary aluminum.
- Category
- Firming agents
- Vegan
- Yes
- Vegetarian
- Yes
What it is
Aluminium ammonium sulphate is a light-metal salt used as a firming agent and acidity regulator.
How it is used in food
Firms texture and buffers acidity.
Commonly found in- Pickled vegetables (historical)
- Candied fruits
Health and safety
The aluminium is the point of concern — it accumulates in bone and tissue and clears slowly, against an EFSA tolerable weekly intake of 1 mg per kg of body weight that parts of the European population already reach from ordinary food.
Part of the aluminum additive family; strict weekly intake limits are advised by EFSA.
Aluminium Accumulation
Aluminium from food additives can accumulate in the body over time, which has been controversially linked to neurological conditions.
Authorised in the EU, with permitted uses cut back in 2012 to reduce total dietary aluminium. EFSA's tolerable weekly intake is 1 mg/kg body weight.
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
- E523
Also printed asAluminium ammonium sulfate · aluminum ammonium sulfate · aluminum ammonium sulphate
Worth knowing
Of the alums it is the one most associated with baking powder, which is where most of its historical dietary contribution came from.
Conclusion
Avoid to limit unnecessary exposure to dietary aluminum.
References
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Open the appEntry last reviewed 2026-07-28.
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