Calcium Aluminium Silicate
Also known as: E556, Calcium aluminosilicate, Calcium silicoaluminate, Aluminium calcium silicate
Aluminium-containing additives have been re-evaluated by EFSA, which set a Tolerable Weekly Intake (TWI) of 1 mg aluminium/kg bw/week for the general population. Several aluminium-containing additives, including E556, were withdrawn or restricted in the EU as a result.
What it is
Calcium aluminium silicate, an anti-caking agent and free-flowing agent (E556).
Anti-caking agent in powdered foods.
Why it's flagged
- aluminium contributes to total dietary aluminium exposure
- potential cumulative neurotoxicity at high intakes
What regulators actually say
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Regulatory status
United States — FDA
Calcium aluminosilicate (calcium aluminium silicate) listed as anti-caking agent (21 CFR 182.2729) for use in table salt up to 2%.
European Union — EFSA
EFSA re-evaluation led to restriction; permitted uses of aluminium-containing additives reduced; TWI 1 mg Al/kg bw/week.
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