title: 1-Ammonio-naphthalene-2-sulfonate.
abstract: In the mol-ecule of the zwitterionic title compound, C(10)H(9)NO(3)S, an intra-molecular N-H⋯O hydrogen bond results in the formation of an almost planar six-membered ring (r.m.s daviation = 0.0150 Å), which is oriented at a dihedral angle of 1.63 (3)° with respect to the naphthalene ring system. In the crystal structure, inter-molecular N-H⋯O hydrogen bonds link the mol-ecules into a two-dimensional network.
authors.affiliation: Materials Chemistry Laboratory, Department of Chemistry, GC University, Lahore 54000, Pakistan.
authors.forename: Ayyaz
authors.initials: A
authors.lastname: Mahmood
authors.forename: Ayoub
authors.initials: A
authors.lastname: Rashid
authors.forename: Muhammad Nadeem
authors.initials: MN
authors.lastname: Arshad
authors.forename: Hafiz Muhammad Adeel
authors.initials: HM
authors.lastname: Sharif
authors.forename: Islam Ullah
authors.initials: IU
authors.lastname: Khan