What is E555?

E555 (Potassium aluminium silicate) is a anti-caking agents food additive. Anti-caking agent, contains aluminium. E555 sits in the E500–E599 series, which in the EU classification mainly covers acidity regulators and anti-caking agents.

What is E555 used for?

E555 belongs to the anti-caking agents group. Anti-caking agents stop powders clumping, as in salt and spices.

Is E555 safe?

E555 is rated “moderate”. It is approved for use in food, but some people prefer to limit it. “Moderate” means it is approved, but is debated or something some people prefer to limit.

How E555 appears on labels

On food packaging you'll find E555 either as the number “E555” or by the name “Potassium aluminium silicate” 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 E555 vegan?

Yes, E555 is suitable for vegans.