4-Methyl­anilinium 4-hy­droxy­benzene­sulfonate

In the crystal of the title molecular salt, C(7)H(10)N(+)·C(6)H(5)O(4)S(−), the benzene­sulfonate units are linked through phenol–sulfonate O—H⋯O hydrogen bonds, forming chains along the c-axis direction. These chains are linked via N—H⋯O hydrogen bonds involving two of the three H atoms of the ammonium group of the 4-methyl­anilium cation, giving rise to two-dimensional networks parallel to the bc plane which are further connected through an additional N—H⋯O inter­action in which the third ammonium H atom is involved, generating a three-dimensional network.