In the title compound, C9H10ClNO3S, the amide H atom is syn with respect to the ortho-methyl group in the benzene ring and the C—S—N—C torsion angle is 66.9 (2)°. An intramolecular N—H...Cl hydrogen bond occurs. The crystal structure features inversion-related dimers linked by pairs of N—H...O hydrogen bonds.
