In the title compound, C(6)H(16)N(+)·C(15)H(13)N(2)O(2)S(2) (-), the thione S atom is in a cis configuration with respect to the phenyl and benzene rings, while it adopts a trans configuration with respect to the carbonyl group. The dihedral angle between the benzene and phenyl rings is 78.81 (2)°. The mol-ecular conformation is stabilized by intra-molecular O-H⋯O and N-H⋯S hydrogen bonds, while inter-molecular N-H⋯O, N-H⋯N and weak C-H⋯O inter-actions help to stabilize the crystal structure.