E521Under monitoring
Aluminium sodium sulphate
Function: Food Additive
E521 is the European food-additive number for Aluminium sodium sulphate. Aluminium sodium sulphate (E521) is a food additive used as a food additive.
Is E521 safe or restricted?
E521 is approved for use in the EU. It sits among the additives EFSA keeps under ongoing review as new evidence is published. Forkin classifies it as “Under monitoring” and does not make health claims. See the methodology for how regulatory levels are assigned.
Frequently asked questions about E521
- What is E521?
- E521 is the E-number for Aluminium sodium sulphate. Aluminium sodium sulphate (E521) is a food additive used as a food additive.
- Is E521 vegan or vegetarian?
- It depends on the source. Many additives can be produced from plant, mineral, or animal-derived raw materials, and the ingredient list rarely states which was used. The Forkin app shows the verified vegan and vegetarian status per product where it's known, instead of a blanket guess.
- Is E521 safe, and is it banned anywhere?
- E521 is approved for use in the EU. It sits among the additives EFSA keeps under ongoing review as new evidence is published. Forkin classifies it as "Under monitoring" and does not make health claims — see the methodology page for how regulatory levels are assigned, and the Forkin app for the full profile, including acceptable daily intake (ADI) and restrictions by country.
See the full profile in Forkin
The Forkin app surfaces the full regulatory profile of E521 — acceptable daily intake (ADI), restrictions by country, vegan/vegetarian status, alternative names, and which products in your scan history contain it.