Vapour pressures, aqueous solubilities, Henry's law constants, partition coefficients between gas/water (K-gw), N-octanol/water (K-ow) and gas/N-octanol (K-go) of 106 polychlorinated diphenyl ethers (PCDE)

Modelling the environmental fate of persistent organic pollutants like poly chlorinated diphenyl ethers (PCDE) requires the knowledge of a number of fu ndamental physico-chemical properties of these compounds. We report here th e physico-chemical properties of 106 PCDEs, which are over 50% of all possi ble congeners. Vapour pressures P-OL, water solubilities S-H2O, and n-octan ol/water partition coefficients K-OW were determined with chromatographic m ethods. With these experimental data the Henry's law constants H, gas/water K-GW and gas/n-octanol K-GO partition coefficients were calculated. Vapour pressures and water solubilities and n-octanol/water partition coefficient s of the PCDEs are close to those of similar groups of organochlorine compo unds like polychlorinated biphenyls (PCBs) and dibenzofurans (PCDFs). A sim ilar environmental fate can be predicted and was partially already been obs erved (C) 1998 Elsevier Science Ltd. All rights reserved.