In the title molecule, C 14 H 10 ClNO 3 , the amide C=O bond is anti to the o -carboxy substituent in the adjacent benzene ring, a conformation that facilitates the formation of an intramolecular amide-N—H...O(carbonyl) hydrogen bond that closes an S (6) loop. The central amide segment is twisted away from the carboxy- and chloro-substituted benzene rings by 13.93 (17) and 15.26 (15)°, respectively. The most prominent supramolecular interactions in the crystal packing are carboxylic acid-H...O(carboxyl) hydrogen bonds that lead to centrosymmetric dimeric aggregates connected by eight-membered {...HOC=O} 2 synthons.