4-(Benzyl-ideneamino)benzene-sulfonamide.

The title compound, C(13)H(12)N(2)O(2)S, formed by Schiff base condensation of benzaldehyde with sulfanilamide, crystallizes as discrete mol-ecular species linked by N-H⋯N and N-H⋯O hydrogen bonds between the sulfamide nitro-gen H atoms and the aza-methine N and one sulfamide O atom, respectively, forming a two-dimensional array in the bc plane. The aza-methine group is rotated slightly out of the benzaldehyde benzene plane [C-C-C-N torsion angle = 8.1 (3)°], while the dihedral angle between the two benzene rings is 30.0 (1)°.