4-(2-Chlorobenzylidenehydrazinocarbonyl)-2-methyl-2H-pyrazole-3-sulfonamide

In the title compound, C12H12ClN5O3S, the pyrazole ring and the benzene ring are approximately coplanar. The mean plane of the pyrazole ring makes a dihedral angle of 12.82 (13)° with the mean plane of the benzene ring. The crystal packing is stabilized by intra­molecular N—H⋯O and inter­molecular N—H⋯O and N—H⋯N hydrogen bonds.