E262: Sodium diacetate

What is E262?

Sodium diacetate is a compound of sodium acetate and acetic acid, combined in a single crystalline powder. Listed as E262(ii), it releases acetic acid in food and smells and tastes of vinegar.

Origin and production

It is manufactured synthetically by reacting acetic acid with a sodium compound such as sodium carbonate or sodium hydroxide.

Why is it used?

Sodium diacetate is a preservative that helps control the growth of bacteria and moulds, particularly in cooked meats, sausages, sandwiches and ready meals. It also provides a dry vinegar flavour, which is why it is often used in salt-and-vinegar crisps and other snacks.

Vegan, vegetarian and halal

Sodium diacetate is synthetic and contains no animal-derived ingredients, making it suitable for vegans and vegetarians on its own. It is not generally a concern for halal or kosher diets.

Safety and regulation

Sodium diacetate is authorised as a food additive in the EU and has been evaluated by EFSA. It breaks down into acetate and sodium, substances that are normally present in the diet and body.

Common in