IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Glass Ball as Bullet Solubility System: 1,4-Difluorobenzene with Water

   (1) Water; H2O; [7732-18-5]  NIST Chemistry WebBook for detail
   (2) 1,4-Difluorobenzene; C6H4F2; [540-36-3]  NIST Chemistry WebBook for detail

Original Measurements:
   Jockers, R., Ph.D. Dissertation, University of Bochum, Bochum, 1976.

   Temperature = Temperature and pressure

Prepared By:
   A. L. Horvath

Experimental Data:   (Notes on the Nomenclature)
t/°CMolality mol1/kgmol1/kg Note10-2 * g1/kgg1/kg Note102 * Mole Fraction x1x1 Note
   a  Calculated by compiler.
   b  Calculated by F. W. Getzen.
   c  Reported.

   The measurements were made using a high temperature, high pressure optical cell made from stainless steel with an internal stirrer. Predetermined mixtures of 1,4-difluorobenzene in water were introduced into the cell and homogenized at various temperatures and pressures. The phase transitions were observed through a sapphire window at the appropriate temperatures and pressures. Further details have been included in (1,2).

Source and Purity of Materials:
   (1) Fluka AG., Buchs, Schweiz, 99.5% pure, redistilled before use.
   (2) Boiled with KMnO4 and redistilled before use.

Estimated Errors:
   Solubility: ± 1%.
   Temperature: ±0.5 K.
   Pressure: ± 2 bar.

   1Gotze, G.; Jockers, R.; Scheider, G. M. 4th Inter. Conf. Chem. Thermodyn. IUPAC, Montpellier, Aug. 26-30, 1975, Part IV/9, pp 57-64.
   2 Jockers, R.; Schneider, G. M. Ber. Bunsenges. Phys. Chem. 1978, 83, 576-62.