Tris(2-amino-1,3-thia-zolium) hydrogen sulfate sulfate monohydrate.

The centrosymmetric crystal structure of the novel semi-organic compound, 3C3H5N2S+·HSO4 −·SO4 2−·H2O, is based on chains of alternating anions and water mol­ecules (formed by O—H⋯O hydrogen bonds). The chains are inter­connected with the 2-amino-1,3-thia­zolium cations via strong N—H⋯O and weak C—H⋯O hydrogen-bonding inter­actions into a three-dimensional network.