In the title compound, C9H12N2O7S2, the nitro substituent is slightly twisted from the benzene ring [dihedral angle = 14.69 (10)°]. The molecular geometry is stabilized by intramolecular C—H⋯O hydrogen bonds, forming S(6) ring motifs. In the crystal, molecules are linked by C—H⋯O hydrogen bonds into layers parallel to (10-2).