(Z)-3-[2-(2,4-Di-nitro-phen-yl)hydrazin-1-yl-idene]isobenzo-furan-1(3H)-one di-chloro-methane hemisolvate.

In the title compound, 2C14H8N4O6·CH2Cl2, the di-chloro-methane solvent mol-ecule resides on a crystallographic twofold axis. The mean plane of the phthaliso-imide ring is oriented at a dihedral angle of 32.93 (12)° with respect to the nitro-substituted benzene ring. An intra-molecular N-H⋯O hydrogen bond occurs. The crystal packing features a short Cl⋯O halogen-bond inter-action [3.093 (3) Å].