Four substituted stilbazolium halides were studied for stability in aq. mediums (distd. water, surface water, sewage) and recovered by solid-liq. extn. chromatog. on 4 solid phases. The ay. decrease in the stability of the tested compds. after 12 months was about 30%. The highest recovering degree (nearly 97%) was achieved on benzylpropyl and naphthylpropyl solid phases.