Is E521 Vegan? Aluminium Sodium Sulphate
E521 (Aluminium Sodium Sulphate) is vegan. It is derived from mineral, with no animal involvement in standard food production.
Why is E521 vegan?
The source of Aluminium Sodium Sulphate is mineral, which is plant-derived, mineral or synthetic — all acceptable for vegans.
Is E521 vegetarian?
E521 is vegetarian.
What should vegans do about E521?
If you're avoiding Aluminium Sodium Sulphate, look for products without E521 in the ingredients list.
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Helpful for vegan label reading
Resources for vegans checking E-numbers like E521
Vegan Ingredient Guide
Spot hidden animal-derived E-numbers including E521 on any food label.
Vegan Label Reading
Books and pocket cards that decode E-numbers and hidden animal additives in seconds.
Certified Vegan Foods
Products with vegan certification logos — no ingredient-by-ingredient guessing.
E521 vegan FAQs
Is E521 vegan?
E521 is always vegan: mineral.
Is E521 always non-vegan?
No — E521 is always vegan. It is derived from mineral in all standard food uses.
How can I tell if E521 is vegan in a specific product?
You don't need to check for E521 specifically — it is always vegan. Look for vegan certification logos if you want a full product-level guarantee.
Other additives to watch for vegans
Data: Open Food Facts (ODbL). Vegan status reflects the most common source — always verify with manufacturer or look for certified vegan labelling.