A study of the atmospheric reactions of 1,3-dichloropropene and other selected organochlorine compounds

Abstract

Thecis- andtrans-1,3-dichloropropene isomers are widely used as an insecticide fumigant in a variety of commercial formulations such as D-D,® Vidden D,® Telone,® Telone II,® and Telone C17.® In order to investigate their atmospheric lifetimes and reaction mechanisms, kinetic and product data have been obtained at room temperature for the gas phase reactions of part-per-million (ppm) concentrations ofcis- andtrans-1,3-dichloropropene with O3 and with OH radicals in Teflon chambers. In addition, rate constants for OH radical and O3 reactions with 1,2-dichloropropane and 3-chloro-2-chloromethyl-1-propene have been determined. The products observed by FT-IR analyses from the reaction of O3 with the two 1,3-dichloropropene isomers were formyl chloride and chloroacetaldehyde, together with chloroacetic acid, HCl, CO, CO2, and formic acid. The products observed from the reaction of OH radicals with the 1,3-dichloropropene isomers were formyl chloride and chloroacetaldehyde, with unit yields. The kinetic data allow atmospheric lifetimes to be estimated for the four halogenated organic chemicals studied and, together with literature data, permit the estimation of atmospheric lifetimes for other halogenated organic compounds for which no experimental data are available. The reaction pathways and atmospheric lifetimes of these widely employed chemicals are discussed.