Potassium Benzoate (E212), the potassium salt of benzoic acid, 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. Acidic foods and beverages such as fruit juice (citric acid), sparkling drinks (carbonic acid), soft drinks (phosphoric acid), and pickles (vinegar) may be preserved with potassium benzoate. It is approved for use in most countries including Canada, the U.S., and the EU, where it is designated by the E number E212. In the EU, it is not recommended for consumption by children.
One very common way to make potassium benzoate is by oxidizing toluene. Another way to synthesize potassium benzoate in the lab setting is by reacting methyl benzoate with potassium thioacetate.
Potassium Benzoate is used in a wide variety of cosmetics and personal care products, such as bath products, soaps and detergents, baby products, eye makeup, blushers, cleansing products, make up products and skin care products.
Potassium Benzoate is an acidic food preservative that inhibits the growth of mold, yeast and some bacteria. It is used in foods such as in low-sugar jams, marmalades, jellies, fruit juices, carbonated drinks, pickles. It is also used as a preservative in beverage such as in soft drinks and sodas.
Potassium Benzoate is also used as the whistle in many fireworks.