3-[4-(Acetamido)benzenesulfonamido]benzoic acid

In the title compound, C15H14N2O5S, the dihedral angle between the aromatic rings is 63.20 (11) . The crystal structure displays classical intermolecular O—H...O hydrogen bonding typical for carboxylic acids, forming centrosymmetric dimers. These dimers are further connected by N—H...O and C—H...O hydrogen bonds to form an extended network.