What is E242?

Dimethyl dicarbonate (DMDC) is a colorless liquid with a pungent odor at high concentration at room temperature. It is primarily used as a beverage preservative, processing aid, or sterilant being highly active against typical beverage spoiling microorganisms like yeast, bacteria, or mould. E242 sits in the E200–E299 series, which in the EU classification mainly covers preservatives.

What is E242 used for?

E242 belongs to the preservatives group. Preservatives stop food from spoiling by slowing bacteria, mould and yeast. Most are safe, though some people limit certain ones.

Is E242 safe?

E242 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 E242 appears on labels

On food packaging you'll find E242 either as the number “E242” or by the name “Dimethyl dicarbonate” 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 E242 vegan?

Yes, E242 is suitable for vegans.