biostudies-literatureUnknown67(Pt 4)Berrah FIn the title compound, 2C(6)H(7)N(2)O(2) (+)·SO(4) (2-)·3H(2)O, there are two independent cations which are connected into N-H⋯O hydrogen-bonded dimers. In the crystal, O-H⋯O hydrogen-bonded sulfate-water sheets run parallel to (001) and are linked into a three-dimensional network via inter-molecular N-H⋯O and O-H⋯O hydrogen bonds through the 2-amino-nicotinium dimers. Further stabilization is provided by weak inter-molecular C-H⋯O hydrogen bonds. R(4) (3)(10) and R(2) (2)(8) graph-set rings are observed. The crystal studied was an inversion twin with refined components of 0.45 (6) and 0.55 (6).Acta crystallographica. Section E, Structure reports onlineo953-4https://www.ebi.ac.uk/biostudies/studies/S-EPMC3099893biostudies-literatureBis(2-amino-3-carb-oxy-pyridinium) sulfate trihydrate.PMC3099893Roisnel TBouacida SOuakkaf ABerrah FfalseBis(2-amino-3-carb-oxy-pyridinium) sulfate trihydrate.In the title compound, 2C(6)H(7)N(2)O(2) (+)·SO(4) (2-)·3H(2)O, there are two independent cations which are connected into N-H⋯O hydrogen-bonded dimers. In the crystal, O-H⋯O hydrogen-bonded sulfate-water sheets run parallel to (001) and are linked into a three-dimensional network via inter-molecular N-H⋯O and O-H⋯O hydrogen bonds through the 2-amino-nicotinium dimers. Further stabilization is provided by weak inter-molecular C-H⋯O hydrogen bonds. R(4) (3)(10) and R(2) (2)(8) graph-set rings are observed. The crystal studied was an inversion twin with refined components of 0.45 (6) and 0.55 (6).2011-01-01T00:00:00Z2011 Apr2025-04-04T23:27:05.171Z2019-03-26T23:59:22ZS-EPMC30998932175421910.1107/S1600536811010191