Chemical changes of organic compounds in chlorinated water : XIII. Gas chromatographic—mass spectrometric studies of the reactions of Irgasan DP 300 [5-chloro-2-(2,4-dichlorophenoxy_phenol] with chlorine in dilute aqueous solution

Abstract

The reactions of Irgasan DP 300 with chlorine in water were investigated by means of gas chromatography (GC) and GC—mass spectrometry. Irgasan DP 300 was shown to produce dichloro- and trichloro-2-(2,4-dichlorophenoxyl)phenols in chlorine-treated water, followed by the decomposition of these intermediates to chlorophenols. No polychlorinated dibenzo- p-dioxins were detected in chlorine-treated Irgasan DP 300 solutions. The production of some of these compounds is dependent on the number of equivalents of chlorine per mol of compounds and on the reaction pH.