Back to catalogSafety
E521Anti-caking agentModerate concern
Aluminium Sodium Sulfate
In plain words
The short version
SAS — a baking-powder acid component, now restricted in EU because of aluminium-load concerns.
Why we flag it amber
It's permitted and generally considered safe, but there are a few reasons to be mindful — like sensitivities in some people, debated studies, or intake limits. The Safety section below explains the specifics.
Safety profile
ADI of 0–1 mg/kg body weight (combined aluminium). Same EFSA re-evaluation concerns as E520 — the more soluble aluminium forms contribute more to absorbed aluminium than insoluble or metallic forms.
The detail
Educational information only. Not medical or dietary advice.