2-Nitro-N,N-bis(2-nitro­phenyl­thio)­benzenesulfon­amide

The central N atom of C₁₈H₁₂N₄O₈S is essentially planar, lying 0.071 (2) Å out of the plane defined by the three S atoms. N—S distances are 1.712 (2) and 1.721 (2) Å to S—Ar, and 1.681 (2) Å to SO₂—Ar. The nitro group on the phenyl ring carrying the SO₂ group lies out of plane, with C—C—N—O– torsion angle 69.8 (3)°, while the other two nitro groups are near coplanarity, with torsion angle magnitudes 10.4 (3) and 14.0 (3)°.