organic compounds
In the title compound, C8H10N2O4S, the N—N bond length [1.3488 (18) Å] indicates some double-bond character, while the torsion angle between the aromatic ring and the nitramine group [66.3 (2)°] rules out further delocalization in the molecule. The geometry of the methylsulfonyl substituent is quasi-tetrahedral, as expected. The crystal packing is stabilized by C—HO hydrogen bonds, with the molecules arranged in chains extended along the [101] direction.