Potassium Benzoate

Potassium benzoate is a chemical compound that is the potassium salt of benzoic acid. It is typically produced synthetically. It is used as a food preservative.

Manufacturers add potassium benzoate to foods and beverages as a preservative. It helps prevent the growth of mold, yeast, and bacteria, particularly in acidic products like soft drinks, fruit juices, and pickled foods.

Potassium benzoate is an FDA-approved food additive. JECFA has evaluated potassium benzoate and set an acceptable daily intake. EFSA has also evaluated its safety. A notable concern is its potential to react with ascorbic acid (Vitamin C) in certain conditions (such as heat and light) to form benzene, which is a known carcinogen. The FDA has studied this issue and states that benzene levels in beverages are generally very low and below levels of concern.