What is E311?

Octyl gallate is the ester of 1-octanol and gallic acid. As a food additive, it is used under the E number E311 as an antioxidant and preservative. E311 sits in the E300–E399 series, which in the EU classification mainly covers antioxidants and acidity regulators.

What is E311 used for?

E311 belongs to the antioxidants group. Antioxidants stop fats going rancid and food discolouring. Several are natural, such as ascorbic acid (vitamin C).

Is E311 safe?

E311 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 E311 appears on labels

On food packaging you'll find E311 either as the number “E311” or by the name “Octyl gallate” 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 E311 vegan?

Yes, E311 is suitable for vegans.