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IUPAC-NIST Solubility Database
NIST Standard Reference Database 106
Solubility System:
Ethanol with Toluene and Water
Components:
(1) Water; H2O; [7732-18-5]
NIST Chemistry WebBook
for detail
(2) Ethanol (ethyl alcohol); C2H6O; [64-17-5]
NIST Chemistry WebBook
for detail
(3) Toluene (methylbenzene); C7H8; [108-88-3]
NIST Chemistry WebBook
for detail
Original Measurements:
Washburn, R.E.; Beguin, A.E.; Beckord, O.C., J. Am. Chem. Soc. 61, 1694 (1939).
Variables:
Temperature = 298 K
Prepared By:
A. Skrzecz
Experimental Data:
(Notes on the Nomenclature)
Compositions along the saturation curve
t/°C
T/K
Mass Fraction w
1
Mass Fraction w
2
Mole Fraction x
1
(compiler)
Mole Fraction x
2
(compiler)
25.0
298.2
0.0936
0.8984
0.1662
0.7975
25.0
298.2
0.1304
0.8554
0.2194
0.7195
25.0
298.2
0.1674
0.8113
0.2668
0.6464
25.0
298.2
0.2066
0.7633
0.3106
0.5737
25.0
298.2
0.2529
0.7046
0.3543
0.4935
25.0
298.2
0.3266
0.6061
0.4074
0.3780
25.0
298.2
0.4083
0.4926
0.4497
0.2712
25.0
298.2
0.4737
0.3940
0.4695
0.1952
25.0
298.2
0.5289
0.2952
0.4696
0.1310
25.0
298.2
0.5496
0.2467
0.4604
0.1033
25.0
298.2
0.5642
0.1996
0.4449
0.0787
25.0
298.2
0.5676
0.1766
0.4333
0.0674
25.0
298.2
0.5666
0.1294
0.4022
0.0459
25.0
298.2
0.5546
0.0941
0.3697
0.0314
25.0
298.2
0.5304
0.0637
0.3315
0.0199
25.0
298.2
0.5178
0.0533
0.3155
0.0162
25.0
298.2
0.4889
0.0372
0.2843
0.0108
25.0
298.2
0.4248
0.0175
0.2284
0.0047
Distribution of ethanol in ethanol-toluene-water system
t/°C
T/K
Mass Fraction w
1
Comment(s)
25.0
298.2
0.002
hydrocarbon-rich phase
25.0
298.2
0.007
hydrocarbon-rich phase
25.0
298.2
0.013
hydrocarbon-rich phase
25.0
298.2
0.027
hydrocarbon-rich phase
25.0
298.2
0.047
hydrocarbon-rich phase
25.0
298.2
0.053
hydrocarbon-rich phase
25.0
298.2
0.065
hydrocarbon-rich phase
25.0
298.2
0.082
hydrocarbon-rich phase
25.0
298.2
0.094
hydrocarbon-rich phase
25.0
298.2
0.110
water-rich phase
25.0
298.2
0.192
water-rich phase
25.0
298.2
0.257
water-rich phase
25.0
298.2
0.352
water-rich phase
25.0
298.2
0.417
water-rich phase
25.0
298.2
0.469
water-rich phase
25.0
298.2
0.500
water-rich phase
25.0
298.2
0.533
water-rich phase
25.0
298.2
0.556
water-rich phase
Method/Apparatus/Procedure:
The solubility curve was determined in a constant temperature bath by a titration method similar to that reported in Refs. 1-3. Refractive indexes were measured with an Abbe refractometer at the same temperature and presented as a concentration function in a graph. This graph was used to determine the concentration of alcohol in the same of each phase when equilibrium had been reached. Phase equilibrium data were reported only as distribution of ethanol.
Source and Purity of Materials:
(1) Source not specified; commercial grade absolute ethanol; refluxed over lime, distilled; d(25°C,4°C)=0.7851, n(25°C,D)=1.359 40.
(2) Source not specified; analytical reagent grade; dried over Na, distilled; d(25°C,4°C)=0.8608, n(25°C,D)=1.493 71.
(3) Distilled over KMnO
4
.
Estimated Errors:
Solubility: Not reported.
Temperature: Temp. ±0.1°C.
References:
1
E. R. Washburn, V. Hnizda, and R. Vold, J. Am. Chem. Soc. 53, 3237 (1931).
2
R. Vold and E. R. Washburn, J. Am. Chem. Soc. 54, 4217 (1932).
3
E. R. Washburn and H. C. Spencer, J. Am. Chem. Soc. 56, 361 (1934).