In the crystal of the title compound, C12H9Cl2NO2S, the molecule is twisted at the S atom with a C—SO2—NH—C torsion angle of 58.4 (3)°. Furthermore, the N—H bond in this segment is anti to the meta-chloro group. The dihedral angle between the aromatic rings is 77.1 (1)°. The crystal structure features inversion-related dimers linked by N—H...O hydrogen bonds.
