title: Hydrazine-1,2-diium bis-(3-carb-oxy-4-hy-droxy-benzene-sulfonate) tetra-hydrate.
abstract: 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.
authors.affiliation: Department of Chemistry, Government College of Technology, Coimbatore 641 013, India.
authors.forename: Devipriya
authors.initials: D
authors.lastname: Selvaraju
authors.forename: Ranjithkumar
authors.initials: R
authors.lastname: Venkatesh
authors.forename: Vairam
authors.initials: V
authors.lastname: Sundararajan