Benzoic acid is a mono-functional, aromatic acid, which is widely used as a building block for the synthesis of alkyd resins. It is also used as a preservative in select industrial applications. When used as a component of alkyd resins, it improves gloss, hardness and chemical resistance. When used as a preservative, benzoic acid increases storage stability and reduces corrosion for emulsions, polishes, waxes, paints and liquid detergents.
Benzoic acid, C7H6O2 (or C6H5COOH), is a colorless crystalline solid and a simple aromatic carboxylic acid. The name is derived from gum benzoin, which was for a long time its only known source. Benzoic acid occurs naturally in many plants and it serves as an intermediate in the biosynthesis of many secondary metabolites. Salts of benzoic acid are used as food preservatives and benzoic acid is an important precursor for the industrial synthesis of many other organic substances. The salts and esters of benzoic acid are known as benzoates.