NN-Dichloro poly(styrene-co-divinylbenzene) sulfonamide (1) reacts with 2-chloro ethyl phenyl sulfide (2), a simulant of sulfur mustard (SM), at room temperature, yielding corresponding nontoxic sulfones and sulfoxides in aqueous as well as aprotic medium. The decontamination reaction was monitored by gas chromatography, and products were identified by gas chromatography-mass spectrometry. N,N-dichloro poly(styrene-codivinylbenzene) sulfonamicle was synthesized by three steps from a commercial starting material sulfonate cationexchange resin and characterized by FTIR, and TGA, and compressive strength by universal testing machine. The positive chlorine content of this polymer was checked by standard iodometry fitration. The synthesized positive chlorine compound is observed to be a promising against a simulant of SM, chiefly in the situation where use of aqueous medium is precluded. (c) 2007 Wiley Periodicals, Inc.