What is E351?

Potassium malate is a compound with formula K2(C2H4O(COO)2). It is the potassium salt of malic acid. E351 sits in the E300–E399 series, which in the EU classification mainly covers antioxidants and acidity regulators.

What is E351 used for?

E351 belongs to the antioxidants group. Antioxidants stop fats going rancid and food discolouring. Several are natural, such as ascorbic acid (vitamin C).

Is E351 safe?

E351 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 E351 appears on labels

On food packaging you'll find E351 either as the number “E351” or by the name “Potassium malate” 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 E351 vegan?

Yes, E351 is suitable for vegans.