In the title salt, C(6)H(10)N(2) (2+)·2C(7)H(5)O(6)S(-), the negative charge of the anion resides on the sulfonate group. In the crystal, the cations and anions are -linked by N-H⋯O and O-H⋯O hydrogen bonds, forming a three-dimensional network. The complete dication is generated by crystallographic twofold symmetry.