2,3-Diamino-pyridinium 3-carb-oxy-4-hy-droxy-benzene-sulfonate monohydrate.
In the title hydrated mol-ecular salt, C(5)H(8)N(3) (+)·C(7)H(5)O(6)S(-)·H(2)O, the ion pairs and water mol-ecules are connected by N-H⋯O, O-H⋯O and C-H⋯O hydrogen bonds, thereby forming a three-dimensional network. There is an intra-molecular O-H⋯O hydrogen bond in the 3-carb-oxy-4-hy-droxy-benzene-sulfonate anion, which generates an S(6) ring motif.
X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, 11800 USM, Penang,  Malaysia.
Madhukar
M
Hemamalini
Jia Hao
JH
Goh
Hoong-Kun
HK
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