What is E355?

Adipic acid or hexanedioic acid is an organic compound with the chemical formula C6H10O4. It is a white crystalline powder at standard temperature and pressure. E355 sits in the E300–E399 series, which in the EU classification mainly covers antioxidants and acidity regulators.

What is E355 used for?

E355 belongs to the antioxidants group. Antioxidants stop fats going rancid and food discolouring. Several are natural, such as ascorbic acid (vitamin C).

Is E355 safe?

E355 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 E355 appears on labels

On food packaging you'll find E355 either as the number “E355” or by the name “Adipic acid” 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 E355 vegan?

Yes, E355 is suitable for vegans.