What is E517?

Ammonium sulfate ; [NH4]2SO4, is an inorganic salt with a number of commercial uses. The most common use is as a soil fertilizer. E517 sits in the E500–E599 series, which in the EU classification mainly covers acidity regulators and anti-caking agents.

What is E517 used for?

E517 belongs to the stabilisers group. Stabilisers keep mixtures even and stop ingredients separating. Most are safe.

Is E517 safe?

E517 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 E517 appears on labels

On food packaging you'll find E517 either as the number “E517” or by the name “Ammonium sulphate” 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 E517 vegan?

Yes, E517 is suitable for vegans.