Potassium benzoate

Potassium benzoate is the potassium salt of benzoic acid. It is produced by the reaction of benzoic acid with potassium hydroxide. Benzoic acid itself can be produced synthetically or derived from natural sources like fruits and spices.

Potassium benzoate functions as a preservative, inhibiting the growth of mould, yeast, and some bacteria. It is often used in acidic foods and beverages where it is most effective, such as soft drinks, fruit juices, jams, and pickles. Its use helps to extend the shelf life of these products.

Potassium benzoate is an authorised food additive in Great Britain, listed on the Register of Food Additive Authorisations. The European Food Safety Authority (EFSA) has evaluated potassium benzoate and benzoic acid. JECFA has also evaluated it and set an acceptable daily intake. At typical intake levels found in food, it is not associated with adverse health effects for most people. Some studies have explored potential links to hyperactivity in children, but the evidence is mixed and regulatory bodies have not established a causal link at permitted levels.