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IUPAC-NIST Solubility Database
NIST Standard Reference Database 106
Solubility System:
1,4-Difluorobenzene with Water
Components:
(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.
Variables:
Temperature = Temperature and pressure
Prepared By:
A. L. Horvath
Experimental Data:
(Notes on the Nomenclature)
t/°C
Molality mol
1
/kg
mol
1
/kg Note
10
-2
* g
1
/kg
g
1
/kg Note
10
2
* Mole Fraction x
1
x
1
Note
260.0
3.069
b
3.501
a
7.84
c
270.0
3.069
b
3.501
a
7.84
c
280.0
3.069
b
3.501
a
7.84
c
Notes:
a
Calculated by compiler.
b
Calculated by F. W. Getzen.
c
Reported.
Method/Apparatus/Procedure:
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 KMnO
4
and redistilled before use.
Estimated Errors:
Solubility: ± 1%.
Temperature: ±0.5 K.
Pressure: ± 2 bar.
References:
1
Gotze, 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.