In the title compound, 2C(4)H(12)N(+)·C(10)H(6)O(6)S(2) (2-), the anion lies on an inversion center, so the asymmetric unit contains half an anion and one cation which are linked by a strong N-H⋯O hydrogen bond. The crystal structure comprises discrete ions, which are linked into centrosymmetric R(4) (4)(12) loops by N-H⋯O inter-actions.