title: 5-(Dimethyl-ammonio)naphthalene-1-sulfonate dihydrate.
abstract: There are two formula units in the asymmetric unit of the title compound, C(12)H(13)NO(3)S·2H(2)O. In the crystal structure, mol-ecules are linked by inter-molecular O-H⋯O, N-H⋯O and weak C-H⋯O hydrogen bonds, forming a three-dimensional network.
authors.affiliation: School of Chemical Engineering and Food Science, Xiangfan University, Xiangfan 441053, People's Republic of China.
authors.forename: Zuo-An
authors.initials: ZA
authors.lastname: Xiao
authors.forename: Dan
authors.initials: D
authors.lastname: Zhan