Abstract
In the title compound, C12H16N2O6S, the S atom adopts a distorted tetrahedral geometry with an O-S-O angle of 119.76 (13)degrees. The nitro group is twisted by 35.34 (2)degrees with respect to the aromatic ring; it accepts an N-H center dot center dot center dot O hydrogen bond, resulting in a S(7) motif. In the crystal, N-H center dot center dot center dot O and O-H center dot center dot center dot O hydrogen bonds connect the molecules into an infinite chain along the a axis. The methyl C atoms of the isopropyl group are disordered in a 1:1 ratio.