title: 3-(6-Amino-pyridinium-3-yl)benzoate monohydrate.
abstract: The title compound, C(12)H(10)N(2)O(2)·H(2)O, crystallizes as a zwitterion in which the pyridine N atom is protonated and the carboxyl OH group is deprotonated. The benzene and pyridinium rings are inclined at a dihedral angle of 54.93 (1)°. In the crystal, O-H⋯O and N-H⋯O hydrogen bonds link the mol-ecules into a three-dimensional supra-molecular network.
authors.affiliation: College of Mechanical and Material Engineering, China Three Gorges University, Yichang 443002,  People's Republic of China.
authors.forename: Zong-Yong
authors.initials: ZY
authors.lastname: Yuan
authors.forename: Jun
authors.initials: J
authors.lastname: Zhao
authors.forename: Zhao
authors.initials: Z
authors.lastname: Peng