What is E521? Aluminium Sodium Sulphate Explained
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E521 is Aluminium Sodium Sulphate — a anti caking agent (mineral) used in table salt, icing sugar.
What is E521 (Aluminium Sodium Sulphate)?
E521 is Aluminium Sodium Sulphate, a food additive classified as a anti-caking agent that prevent powders and granules clumping. A anti caking agent (mineral) used in table salt, icing sugar. You'll find it in table salt, icing sugar, dried soups and many other packaged foods. Like every E-number, E521 has been authorised for use in food following an EFSA safety evaluation — though authorisation doesn't mean concern-free, as the safety section below explains.
Where is E521 found?
E521 (Aluminium Sodium Sulphate) is found in table salt, icing sugar, dried soups, baking powder, powdered drinks, seasoning mixes.
- table salt
- icing sugar
- dried soups
- baking powder
- powdered drinks
- seasoning mixes
Is E521 safe?
E521 is authorised in the EU and UK but carries genuine concerns. For most people consuming Aluminium Sodium Sulphate in typical quantities, health effects are unlikely — but the caution flag reflects either active scientific debate, mandatory warning labels, allergen status, or conditions attached to its authorisation.
EFSA opinion: Aluminium Sodium Sulphate — status Some concerns.
Check the calorie content of foods containing E521. If you’re pregnant, see our pregnancy food safety guide.
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E521 FAQs
What is E521 in food?
E521 is Aluminium Sodium Sulphate — a anti caking agent (mineral) used in table salt, icing sugar.
Is E521 safe to eat?
E521 is authorised in the EU and UK but carries genuine concerns. For most people consuming Aluminium Sodium Sulphate in typical quantities, health effects are unlikely — but the caution flag reflects
Is E521 vegan?
E521 (Aluminium Sodium Sulphate) is vegan. It is derived from mineral, with no animal involvement in standard food production.
Is E521 halal?
E521 (Aluminium Sodium Sulphate) is halal. It is derived from mineral, which involves no haram sources.
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Also check: safe for cats? · safe for dogs? · calorie checker · medication interactions
Data: Open Food Facts (ODbL) · EFSA