Vapour pressures, aqueous solubility, Henry's law constants and air/water partition coefficients of 1,8-dichlorooctane and 1,8-dibromooctane.
New data on the vapour pressures and aqueous solubility of 1,8-dichlorooctane and 1,8-dibromooctane are reported as a function of temperature between 20 degrees C and 80 degrees C and 1 degrees C and 40 degrees C, respectively. For the vapour pressures, a static method was used during the measurements which have an estimated uncertainty between 3% and 5%. The aqueous solubilities were determined using a dynamic saturation column method and the values are accurate to within +/-10%. 1,8-Dichlorooctane is more volatile than 1,8-dibromooctane in the temperature range covered (p(sat) varies from 3 to 250 Pa and from 0.53 to 62 Pa, respectively) and is also approximately three times more soluble in water (mole fraction solubilities at 25 degrees C of 5.95 x 10(-7) and 1.92 x 10(-7), respectively). A combination of the two sets of data allowed the calculation of the Henry's law constants and the air water partition coefficients. A simple group contribution concept was used to rationalize the data obtained.
Sarraute
Sabine
S
Laboratoire de Thermodynamique des Solutions et des Polymères, Université Blaise Pascal Clermont-Ferrand/CNRS, 24 Avenue des Landais, 63177 Aubière, France.
Mokbel
Ilham
I
Costa Gomes
Margarida F
MF
Majer
Vladimir
V
Delepine
Hervé
H
Jose
Jacques
J
D000388:Air; D006846:Hydrocarbons, Halogenated / Q000737:chemistry*; D009795:Octanes / Q000737:chemistry*; D012995:Solubility; D013816:Thermodynamics; D014867:Water
C515398:1,8-dibromooctane; C515397:1,8-dichlorooctane; D006846:Hydrocarbons, Halogenated; D009795:Octanes; D014867:Water