Chlorobenzoic acid is an aromatic carboxylic acid that contains a chlorine atom attached to a benzoic acid structure. It exists in several isomeric forms, depending on the position of the chlorine atom on the benzene ring. The most common isomers are ortho-chlorobenzoic acid, meta-chlorobenzoic acid, and para-chlorobenzoic acid, each differing in the arrangement of the chlorine relative to the carboxylic acid group. This compound is used in various applications, including the synthesis of pharmaceuticals, dyes, and agrochemicals. Its chemical properties make it useful in organic chemistry for creating other compounds through reactions such as esterification and acylation.