2,2′-Diamino-4,4′-bi-1,3-thia­zolium bis­(3-nitro­benzoate)

In the title salt, C(6)H(8)N(4)S(2) (2+)·2C(7)H(4)NO(4) (−), the diprotonated diamino­bithia­zole dication is located on an inversion center. The carboxyl­ate group of the anion is twisted with respect to the benzene ring, with a dihedral angle of 13.6 (4)°. N—H⋯O hydrogen bonds involving the amino and ammonium groups of the dication and the carboxyl­ate functionality of the anion generate supra­molecular chains in the crystal.