3-Chloro-1-ethyl-6-nitro-1 H -indazole

In the title compound, C 9 H 8 ClN 3 O 2 , the terminal C atom of the ethyl group deviates from the indazole ring (r.m.s. deviation = 0.008 Å) by 1.588 (3) Å. The dihedral angle between the ring system and the attached nitro group is 2.8 (3)°. In the crystal, weak C—H...O interactions link the molecules into zigzag chains propagating along [001]. In addition, weak π–π stacking interactions [centroid–centroid separations = 3.6809 (10) and 3.7393 (11) Å] help to consolidate the packing.