title: 2-(2-Nitro-anilino)benzoic acid.
abstract: In the title compound, C(13)H(10)N(2)O(4), the nitro N atom deviates by 0.031 (2) Å from the plane of the benzene ring to which it is attached. The aromatic rings are oriented at a dihedral angle of 50.6 (1)°. An intra-molecular N-H⋯O hydrogen bond occurs. In the crystal, inversion dimers are formed by pairs of O-H⋯O inter-actions.
authors.affiliation: Department of Applied Chemistry, College of Science, Nanjing University of Technology, Nanjing 210009,  People's Republic of China.
authors.forename: Xiao-Lin
authors.initials: XL
authors.lastname: Zhu
authors.forename: Lu
authors.initials: L
authors.lastname: Shi
authors.forename: Peng
authors.initials: P
authors.lastname: Jiang
authors.forename: Tian-Hao
authors.initials: TH
authors.lastname: Zhu
authors.forename: Hong-Jun
authors.initials: HJ
authors.lastname: Zhu