Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

ABSTRACT

Vapor pressures (pi) of selected brominated flame retardants (BFRs), such as three polybrominated diphenyl ethers, PBDEs, 2,2',4,4'-tetrabromodiphenyl ether (BDE-47), 2,2',4,4',5-pentabromodiphenyl ether (BDE-99), and 2,2',4,4',5,5'-hexabromodiphenyl ether (BDE-153), and two non-PBDE BFRs, hexabromobenzene (HBB) and 1,2-bis(2,4,6-tribromophenoxy)ethane (BTBPE) in the temperature range of (313 to 423) K, were measured by the gas saturation method. The standard uncertainties of temperature and vapor pressure measurements were estimated to be within +- 0.08 K and typically ca. +- 3.9 %, respectively. The temperature dependence of pi, namely, enthalpy of sublimation (?subH), was determined by fitting the experimental data with the Clausius Clapeyron equation. From the equation and our previous works on water solubility, pi and Henry s law constant at 298 K for those BFRs were predicted. On the basis of these results, the environmental partitioning characteristics were also discussed.