What is E334?

Tartaric acid is a white, crystalline organic acid that occurs naturally in many fruits, most notably in grapes but also in tamarinds, bananas, avocados, and citrus. Its salt, potassium bitartrate, commonly known as cream of tartar, develops naturally in the process of fermentation. E334 sits in the E300–E399 series, which in the EU classification mainly covers antioxidants and acidity regulators.

What is E334 used for?

E334 belongs to the antioxidants group. Antioxidants stop fats going rancid and food discolouring. Several are natural, such as ascorbic acid (vitamin C).

Is E334 safe?

E334 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 E334 appears on labels

On food packaging you'll find E334 either as the number “E334” or by the name “Tartaric 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 E334 vegan?

Yes, E334 is suitable for vegans.