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IUPAC-NIST Solubility Database
NIST Standard Reference Database 106
Solubility System:
Acetonitrile with Water-d2
Components:
(1) Water-d
2
; D2O; [7789-20-0]
NIST Chemistry WebBook
for detail
(2) Acetonitrile; C2H3N; [75-05-8]
NIST Chemistry WebBook
for detail
Original Measurements:
Szydlowski, J.; Szykula, M., Fluid Phase Equilib. 154, 79 (1999).
Variables:
Temperature = 253 K to 279 K
Prepared By:
Valerii P. Sazonov
Experimental Remarks:
UCST was reported at 278.534 ± 0.005 K at x
1c
= 0.362 ± 0.002 (100 w
1
= 53.8, compiler).
Experimental Data:
(Notes on the Nomenclature)
Mutual solubility of acetonitrile (1) and water-d
2
(2)
t/°C
T/K
10
2
* Mass Fraction w
1
(compiler)
Mole Fraction x
1
Comment(s)
-19.733
253.417
-
-
Water-d2-rich phase
-11.449
261.701
-
-
Water-d2-rich phase
-6.624
266.526
26.9
0.152
Water-d2-rich phase
-2.804
270.346
-
-
Water-d2-rich phase
-1.393
271.757
30.6
0.177
Water-d2-rich phase
0.211
273.361
-
-
Water-d2-rich phase
1.348
274.498
34.0
0.201
Water-d2-rich phase
1.838
274.988
-
-
Water-d2-rich phase
2.953
276.103
-
-
Water-d2-rich phase
3.209
276.359
37.4
0.226
Water-d2-rich phase
3.661
276.811
-
-
Water-d2-rich phase
4.209
277.359
-
-
Water-d2-rich phase
4.277
277.427
40.6
0.250
Water-d2-rich phase
4.786
277.936
-
-
Water-d2-rich phase
4.906
278.056
43.9
0.276
Water-d2-rich phase
5.005
278.155
-
-
Water-d2-rich phase
5.241
278.391
-
-
Water-d2-rich phase
5.313
278.463
47.0
0.302
Water-d2-rich phase
5.340
278.490
-
-
Water-d2-rich phase
5.354
278.504
49.8
0.326
Water-d2-rich phase
5.384
278.534
52.5
0.350
Water-d2-rich phase
5.385
278.535
-
-
Water-d2-rich phase
-19.733
253.417
89.1
0.800
Acetonitrile-rich phase
-11.449
261.701
85.7
0.745
Acetonitrile-rich phase
-6.624
266.526
82.8
0.702
Acetonitrile-rich phase
-2.804
270.346
79.4
0.653
Acetonitrile-rich phase
-1.393
271.757
-
-
Acetonitrile-rich phase
0.211
273.361
75.5
0.601
Acetonitrile-rich phase
1.348
274.498
-
-
Acetonitrile-rich phase
1.838
274.988
73.5
0.575
Acetonitrile-rich phase
2.953
276.103
71.2
0.547
Acetonitrile-rich phase
3.209
276.359
-
-
Acetonitrile-rich phase
3.661
276.811
69.3
0.524
Acetonitrile-rich phase
4.209
277.359
67.5
0.503
Acetonitrile-rich phase
4.277
277.427
-
-
Acetonitrile-rich phase
4.786
277.936
64.8
0.473
Acetonitrile-rich phase
4.906
278.056
-
-
Acetonitrile-rich phase
5.005
278.155
62.6
0.450
Acetonitrile-rich phase
5.241
278.391
60.1
0.424
Acetonitrile-rich phase
5.313
278.463
-
-
Acetonitrile-rich phase
5.340
278.490
57.7
0.400
Acetonitrile-rich phase
5.354
278.504
-
-
Acetonitrile-rich phase
5.384
278.534
-
-
Acetonitrile-rich phase
5.385
278.535
55.2
0.375
Acetonitrile-rich phase
Method/Apparatus/Procedure:
The synthetic method was used with a simplified version of the apparatus described in work.
1
Temperature was changed at the rate < 0.01 K/min - there was no visible influence of the rate on the transition temperature up to the rate 0.1 K/min. Due to the very weak turbidity a long capillary cell was employed. A 5-mW Polythec HeNe laser was used as a probe for detecting the phase separation.
Source and Purity of Materials:
(1) Byk-Malinckrodt; AR; carefully purified by the column distillation; purity of the collected fractions at least 99.95 mass %.
(2) From Institute of Atomic Energy, Isotope Distribution Center; 99.92 % D; twice distilled.
Estimated Errors:
Temperature: ± 5 mK
References:
1. J. Szydlowski, L. P. Rebelo, and W. A. Van Hook, Rev. Sci. Instrum. 63, 1717 (1992).