What is E525?

Potassium hydroxide is an inorganic compound with the formula KOH, and is commonly called caustic potash. E525 sits in the E500–E599 series, which in the EU classification mainly covers acidity regulators and anti-caking agents.

What is E525 used for?

E525 belongs to the acids & acidity regulators group. Acids and acidity regulators adjust taste and shelf life, such as citric acid (E330).

Is E525 safe?

E525 is considered safe at the levels used in food and is approved for use in the EU. “Safe” means it is approved in the EU and regarded as safe at the levels used in food.

How E525 appears on labels

On food packaging you'll find E525 either as the number “E525” or by the name “Potassium hydroxide” in the ingredient list, often after its function. Ingredients are listed in descending order by weight, so an additive near the end is present only in small amounts.

Is E525 vegan?

Yes, E525 is suitable for vegans.