What is E225?

Potassium sulfite is the inorganic compound with the formula K2SO3. It is the salt of potassium cation and sulfite anion. E225 sits in the E200–E299 series, which in the EU classification mainly covers preservatives.

What is E225 used for?

E225 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 E225 safe?

E225 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 E225 appears on labels

On food packaging you'll find E225 either as the number “E225” or by the name “Potassium sulphite” 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 E225 vegan?

Yes, E225 is suitable for vegans.