'''Acetic acid,''' offical [[IUPAC]] nomenclature, is a weak [[acid]] whose [[chemical formula]] is CH<sub>3</sub>COOH. It is best known for being found in [[vinegar]], at 5-18% acetic acid by weight. | '''Acetic acid,''' offical [[IUPAC]] nomenclature, is a weak [[acid]] whose [[chemical formula]] is CH<sub>3</sub>COOH. It is best known for being found in [[vinegar]], at 5-18% acetic acid by weight. |