What is E212?

Potassium benzoate (E212), the potassium salt of benzoic acid with the formula C6H5COOK, is a food preservative that inhibits the growth of mold, yeast and some bacteria. It works best in low-pH products, below 4.5, where it exists as benzoic acid. E212 sits in the E200–E299 series, which in the EU classification mainly covers preservatives.

What is E212 used for?

E212 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 E212 safe?

E212 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 E212 appears on labels

On food packaging you'll find E212 either as the number “E212” or by the name “Potassium benzoate” 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 E212 vegan?

Yes, E212 is suitable for vegans.