4-[(2-Chloro-4-nitro­phen­yl)diazen­yl]phenol dimethyl­formamide solvate

The principal molecule of the title mol­ecule, C₁₂H₈ClN₃O₃·C₃H₇NO, is essentially planar. The two benzene rings make a dihedral angle of only 6.9 (1)°. The nitro group is slightly twisted with respect to the benzene ring to which it is attached [3.7 (1)°]. The dimethyl­formamide solvent mol­ecule and the azobenzene mol­ecule are linked through a strong O—H...O hydrogen bond. In the crystal structure, the mol­ecules are stacked through π–π inter­actions along [010]. Some weak C—H...O inter­actions stabilize the packing.