2-Amino-5-bromo­pyridinium 3-carb­oxy-4-hy­droxy­benzene­sulfonate

The asymmetric unit of the title salt, C(5)H(6)BrN(2) (+)·C(7)H(5)O(6)S(−), contains two independent 2-amino-5-bromo­pyridinium cations and two independent 3-carb­oxy-4-hy­droxy­benzene­sulfonate anions. The hy­droxy and carboxyl groups of the anions are involved in intra­molecular O—H⋯O hydrogen bonds, which generate S(6) ring motifs. In the crystal structure, the ions are linked by N—H⋯O and O—H⋯O hydrogen bonds into a two-dimensional network parallel to (110). Adjacent networks are linked via C—H⋯O hydrogen bonds.