title: 4-Chloro-anilinium hydrogen oxalate hemihydrate.
abstract: In the title hydrated mol-ecular salt, C(6)H(7)ClN(+)·C(2)HO(4) (-)·0.5H(2)O, the water O atom lies on a crystallographic twofold axis. In the crystal, the anions are linked by O-H⋯O hydrogen bonds, forming chains propagating along the b axis. These chains are inter-connected through O-H⋯O hydrogen bonds from the water mol-ecules and N-H⋯O hydrogen bonds from the cations, building layers parallel to the ab plane.
authors.forename: Hajer
authors.initials: H
authors.lastname: Rahmouni
authors.forename: Wajda
authors.initials: W
authors.lastname: Smirani
authors.forename: Mohamed
authors.initials: M
authors.lastname: Rzaigui
authors.forename: Salem
authors.initials: S
authors.lastname: S Al-Deyab