E521

Aluminium sodium sulphate

What the research shows

Not enough

published research on this page yet

How we decide

A white solid also known as soda alum.

It is used in the manufacture of baking powder and as a food additive.

Written from English Wikipedia¹

Vegan
Vegetarian
EU permitted

Regulatory status

Checked Sep 2026

European Union Permitted EUR-Lex Reg. (EC) 1333/2008
United Kingdom Permitted FSA retained EU law

Status reflects the named register on the date checked. It is not a safety rating. A country appears here once we've found this ingredient on its official list.

How we check

Products

The 6 most-scanned of 1,458 products on Open Food Facts that list aluminium sodium sulphate.

TRIPLE CHOCOLATE MUFFIN Costco · 27 oz 7 additives
Baking Powder Clabber Girl · 230 g 3 additives
Carb control wrap Loven fresh · 12 oz 10 additives
Flour Tortillas Large-Burrito Pueblo Lindo · 20 oz 10 additives
Barbecue Flavored Potato Crisps Clancy's 6 additives
Baking Powder Davis Baking Powder · 0.6 g 3 additives

References

1Sodium alum. Wikipedia. Accessed September 26, 2026.