title: 2-Hydr-oxy-3-nitro-benzamide.
abstract: The asymmetric unit of title compound, C(7)H(6)N(2)O(4), contains two mol-ecules, one of which has a disordered nitro group with an occupancy ratio of 0.517 (9):0.483 (9) for the O atoms. Both mol-ecules contain an intra-molecular O-H⋯O hydrogen bond. In the crystal, both mol-ecules form inversion dimers linked by pairs of N-H⋯O hydrogen bonds, resulting in R(2) (2)(8) ring motifs. The dimers are connected by further N-H⋯O links and weak C-H⋯O inter-actions, resulting in a layered motif.
authors.forename: Abdul Rauf
authors.initials: AR
authors.lastname: Raza
authors.forename: Muhammad
authors.initials: M
authors.lastname: Danish
authors.forename: M Nawaz
authors.initials: MN
authors.lastname: Tahir
authors.forename: Bushra
authors.initials: B
authors.lastname: Nisar
authors.forename: Mohammad S
authors.initials: MS
authors.lastname: Iqbal