E522 – Aluminium potassium sulfate

Description

Aluminium potassium sulfate (Potassium alum) is an inorganic salt functioning primarily as a stabilizer, firming agent, and acidity regulator (E522). It is a double sulfate salt of aluminum and potassium, typically found as a dodecahydrate (KAl(SO₄)₂·12H₂O). It is commonly used in processed egg whites, certain confectionery, and baking powders.

Risks

Notes

Aluminium potassium sulphate, commonly known as potassium alum, is a mineral salt that occurs naturally in certain rock formations and can also be manufactured synthetically. It's made by combining aluminium, potassium, and sulphate compounds. The white, crystalline powder has been used for centuries in various applications, from traditional medicine to food preparation. In food production, this ingredient serves as both a firming agent and acidity regulator. As a firming agent, it helps maintain the crisp texture of pickled vegetables like cucumbers and keeps fruits firm during canning. As an acidity regulator, it helps control the pH level in foods. You'll most commonly encounter it in pickled products, some baked goods (especially traditional recipes), and certain processed vegetables. This additive can be either natural (mined from mineral deposits) or synthetic (manufactured in laboratories), and both forms are functionally identical. It's suitable for vegetarian and vegan diets and doesn't conflict with religious dietary laws. However, some people prefer to limit aluminium-containing additives in their diet, though food authorities consider it safe at the levels typically used in food products.