Sodium Benzoate

Products

Sodium benzoate is used as an excipient in pharmaceuticals, mainly in liquid dosage forms. It is also used in food and cosmetics.

Structure and properties

Sodium benzoate (C7H5NaO2, Mr = 144.1 g/mol) exists as a white, weakly hygroscopic, crystalline or granular powder or as a leaflet and is readily soluble in water. It is the sodium salt of benzoic acid. Sodium benzoate is prepared with sodium hydroxide and benzoic acid:

Effects

Sodium benzoate has antimicrobial properties against fungi and bacteria.

Indications for use

As a preservative.