biostudies-otherUnknown67(Pt 5)Selvaraju DActa crystallographica. Section E, Structure reports onlineo1236-7https://www.ebi.ac.uk/biostudies/studies/S-EPMC3089212Reaction of 5-sulfosalicylic acid with hydrazine hydrate at pH = 1 results in the formation of the title hydrated salt, 0.5N(2)H(6) (2+)·C(7)H(5)O(6)S(-)·2H(2)O. The hydrazinium dications lie on centres of inversion. They are located between 3-carb-oxy-4-hy-droxy-benzene-sulfonate anions, forming inter-molecular N-H?O hydrogen bonds with sulfonate ions and water mol-ecules of crystallisation. Further intra- and inter-molecular O-H?O hydrogen bonds are observed in the crystal structure.biostudies-otherPMC3089212Europe PMCSundararajan VSelvaraju DVenkatesh RfalseHydrazine-1,2-diium bis-(3-carb-oxy-4-hy-droxy-benzene-sulfonate) tetra-hydrate.Reaction of 5-sulfosalicylic acid with hydrazine hydrate at pH = 1 results in the formation of the title hydrated salt, 0.5N(2)H(6) (2+)·C(7)H(5)O(6)S(-)·2H(2)O. The hydrazinium dications lie on centres of inversion. They are located between 3-carb-oxy-4-hy-droxy-benzene-sulfonate anions, forming inter-molecular N-H?O hydrogen bonds with sulfonate ions and water mol-ecules of crystallisation. Further intra- and inter-molecular O-H?O hydrogen bonds are observed in the crystal structure.2011-01-01T00:00:00Z2011 May2019-03-26T23:59:20Z2019-03-26T23:59:20ZS-EPMC30892122175453210.1107/S1600536811014231