Trimethylacetic acid, also known as pivalic acid, is a branched-chain carboxylic acid with the chemical formula (CH3)3CCO2H. It is a colorless, water-insoluble liquid with a characteristic odor. Trimethylacetic acid is used as a chemical intermediate in the production of pharmaceuticals, agrochemicals, and perfumes. It is also employed in the synthesis of polymers, such as polyvinyl acetate and polyvinyl chloride, as well as in the manufacture of esters for flavor and fragrance applications.