title: 4-Benzene-sulfonamido-benzoic acid.
abstract: In the mol-ecule of the title sulfonamide compound, C(13)H(11)NO(4)S, the dihedral angle between the planes of the benzene ring and the carboxyl substituent group is 6.7 (4)°. The two aromatic rings are inclined at 45.36 (15)° to one another. In the crystal, adjacent mol-ecules are linked via classical inter-molecular N-H⋯O and O-H⋯O, and non-classical C-H⋯O hydrogen bonds, which stabilize the crystal structure.
authors.forename: Hafiz Muhammad Adeel
authors.initials: HM
authors.lastname: Sharif
authors.forename: Gui-Ying
authors.initials: GY
authors.lastname: Dong
authors.forename: Muhammad Nadeem
authors.initials: MN
authors.lastname: Arshad
authors.forename: Islam Ullah
authors.initials: IU
authors.lastname: Khan