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IUPAC-NIST Solubility Database
NIST Standard Reference Database 106
Solubility System:
1-Proponal with Toluene and Water
Components:
(1) Water; H2O; [7732-18-5]
NIST Chemistry WebBook
for detail
(2) 1-Proponal (n-propanol, propyl alcohol, n-propyl alcohol); C3H8O; [71-23-8]
NIST Chemistry WebBook
for detail
(3) Toluene (methylbenzene); C7H8; [108-88-3]
NIST Chemistry WebBook
for detail
Original Measurements:
Baker, E.M., J. Phys. Chem. 59, 1182 (1955).
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
0.084 93
0.910 16
0.122 21
0.854 22
25.0
298.2
0.102 97
0.889 78
0.145 54
0.820 27
25.0
298.2
0.131 90
0.857 84
0.181 77
0.771 06
25.0
298.2
0.183 00
0.799 13
0.239 59
0.682 37
25.0
298.2
0.259 06
0.711 36
0.315 27
0.564 64
25.0
298.2
0.301 04
0.657 42
0.346 66
0.493 77
25.0
298.2
0.360 01
0.584 84
0.389 02
0.412 18
25.0
298.2
0.440 89
0.474 42
0.426 88
0.299 59
25.0
298.2
0.478 20
0.414 60
0.432 29
0.244 45
25.0
298.2
0.545 26
0.296 63
0.430 64
0.152 80
25.0
298.2
0.565 96
0.182 99
0.371 67
0.078 38
25.0
298.2
0.539 54
0.116 97
0.306 27
0.043 31
25.0
298.2
0.425 25
0.045 73
0.191 57
0.013 44
25.0
298.2
0.302 95
0.018 55
0.117 50
0.004 69
25.0
298.2
0.226 53
0.006 09
0.081 18
0.001 42
25.0
298.2
0.209 69
0.004 44
0.073 99
0.001 02
Compositions of coexisting phases
t/°C
T/K
Mass Fraction w
1
Mass Fraction w
2
Mole Fraction x
1
(compiler)
Mole Fraction x
2
(compiler)
Comment(s)
25.0
298.2
0.0245
0.9750
0.0370
0.9605
hydrogen-rich phase
25.0
298.2
0.0720
0.9230
0.1042
0.8716
hydrogen-rich phase
25.0
298.2
0.1185
0.8715
0.1645
0.7892
hydrogen-rich phase
25.0
298.2
0.2050
0.7730
0.2620
0.6443
hydrogen-rich phase
25.0
298.2
0.2520
0.7190
0.3082
0.5735
hydrogen-rich phase
25.0
298.2
0.3080
0.6500
0.3532
0.4861
hydrogen-rich phase
25.0
298.2
0.3890
0.5445
0.4027
0.3676
hydrogen-rich phase
25.0
298.2
0.4835
0.4070
0.4339
0.2382
hydrogen-rich phase
25.0
298.2
0.5015
0.3760
0.4341
0.2123
hydrogen-rich phase
25.0
298.2
0.5590
0.2520
0.4129
0.1214
hydrogen-rich phase
25.0
298.2
0.5665
0.1750
0.3672
0.0740
hydrogen-rich phase
25.0
298.2
0.0820
0.0050
0.0262
0.0010
water-rich phase
25.0
298.2
0.1180
0.0045
0.0387
0.0010
water-rich phase
25.0
298.2
0.1400
0.0050
0.0467
0.0011
water-rich phase
25.0
298.2
0.1470
0.0040
0.0493
0.0009
water-rich phase
25.0
298.2
0.1550
0.0050
0.0524
0.0011
water-rich phase
25.0
298.2
0.1590
0.0025
0.0538
0.0006
water-rich phase
25.0
298.2
0.1170
0.0028
0.0607
0.0006
water-rich phase
25.0
298.2
0.1910
0.0035
0.0663
0.0008
water-rich phase
25.0
298.2
0.1930
0.0040
0.0671
0.0009
water-rich phase
25.0
298.2
0.2220
0.0055
0.0792
0.0013
water-rich phase
25.0
298.2
0.2240
0.0060
0.0801
0.0014
water-rich phase
Method/Apparatus/Procedure:
The titration and analytical methods were used. Weighed portions of 1-propanol and toluene in glass stoppered flasks were titrated with water from a calibrated burette. After each portion of water the mixture was shaken and the temperature of the solution was allowed to return to 25°C before further additions of water. When the end-point was reached, the mixture was left in the bath for 30 min before specific gravity and refractive index were determined. The binary two liquid-phase mixtures of toluene and water were treated with 1-propanol and when equilibrium was reached the samples of each layer were removed and refractive indexes were determined. A large-scale graph of refractive index, constructed during the binodal curve determinations, was used to find equilibrium concentrations.
Source and Purity of Materials:
(1) Eastman Kodak Co., distilled over CaCI
2
, middle fraction was used; d(25°C,4°C)=0.799 99±0.0002, n(25°C,D)=1.3854±0.0001.
(2) Source not specified; analytical reagent grade; dried over Na, distilled; d(25°C,4°C)=0.859 39±0.0002, n(25°C,D)=1.3325±0.0001.
(3) Distilled from alkaline potassium permanganate.
Estimated Errors:
Solubility: Not reported.
Temperature: Temp. ±0.1°C.