benzoic acid (C6H5COOH)
Benzoic acid, also called benezenecarboxylic acid, is an aromatic carboxylic acid that takes the form of a white crystalline solid. Benzoic acid occurs naturally in many plants, and is made by oxidation of toluene. It is mainly used as a food preservative. Relative density 1.266 (at 15°C), melting point 122.4°C 252.3°F), boiling point 249°C (480.2°). Compounds containing the benzoyl group (C6H5CO-) were studied by Justus von Liebig and Friedrich Wöhler.