SDS Volume
Volume 78. Acetonitrile Binary Systems, p 1005
Source Publication
Szydlowski, J.; Szykula, M.; Fluid Phase Equilib. 154, 79 (1999).
Conditions:
Room Temp: 253 - 279 $\pu{K}$
Compiler:
Methodology:
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.
Sample Information:
- Byk-Malinckrodt; AR; carefully purified by the column distillation; purity of the collected fractions at least 99.95 mass%.
- From Institute of Atomic Energy, Isotope Distribution Center; 99.92% D; twice distilled.
Measurement Errors:
Ambient temperature: ±5 mK
Methodology Citation
1 Szydlowski, J.; Rebelo, L. P.; Van Hook, W. A.; Rev. Sci. Instrum. 63, 1717 (1992).
System Components:
- Acetonitrile, $\ce{ C2H3N }$; [75-05-8] NIST WebBook
- Water-d2, $\ce{ D2O }$; [7789-20-0] NIST WebBook
Experimental Data
UCST was reported at 278.534 ± 0.005 K at x1c = 0.362 ± 0.002 (100 w1 = 53.8, compiler).
| $T$ (°C) | $T$ ($\pu{K}$) | $x_{1}$ | w1 |
|---|---|---|---|
| -19.733 | 253.417 | - | - |
| -11.449 | 261.701 | - | - |
| -6.624 | 266.526 | 0.152 | 26.9 |
| -2.804 | 270.346 | - | - |
| -1.393 | 271.757 | 0.177 | 30.6 |
| 0.211 | 273.361 | - | - |
| 1.348 | 274.498 | 0.201 | 34.0 |
| 1.838 | 274.988 | - | - |
| 2.953 | 276.103 | - | - |
| 3.209 | 276.359 | 0.226 | 37.4 |
| 3.661 | 276.811 | - | - |
| 4.209 | 277.359 | - | - |
| 4.277 | 277.427 | 0.250 | 40.6 |
| 4.786 | 277.936 | - | - |
| 4.906 | 278.056 | 0.276 | 43.9 |
| 5.005 | 278.155 | - | - |
| 5.241 | 278.391 | - | - |
| 5.313 | 278.463 | 0.302 | 47.0 |
| 5.340 | 278.490 | - | - |
| 5.354 | 278.504 | 0.326 | 49.8 |
| 5.384 | 278.534 | 0.350 | 52.5 |
| 5.385 | 278.535 | - | - |
| -19.733 | 253.417 | 0.800 | 89.1 |
| -11.449 | 261.701 | 0.745 | 85.7 |
| -6.624 | 266.526 | 0.702 | 82.8 |
| -2.804 | 270.346 | 0.653 | 79.4 |
| -1.393 | 271.757 | - | - |
| 0.211 | 273.361 | 0.601 | 75.5 |
| 1.348 | 274.498 | - | - |
| 1.838 | 274.988 | 0.575 | 73.5 |
| 2.953 | 276.103 | 0.547 | 71.2 |
| 3.209 | 276.359 | - | - |
| 3.661 | 276.811 | 0.524 | 69.3 |
| 4.209 | 277.359 | 0.503 | 67.5 |
| 4.277 | 277.427 | - | - |
| 4.786 | 277.936 | 0.473 | 64.8 |
| 4.906 | 278.056 | - | - |
| 5.005 | 278.155 | 0.450 | 62.6 |
| 5.241 | 278.391 | 0.424 | 60.1 |
| 5.313 | 278.463 | - | - |
| 5.340 | 278.490 | 0.400 | 57.7 |
| 5.354 | 278.504 | - | - |
| 5.384 | 278.534 | - | - |
| 5.385 | 278.535 | 0.375 | 55.2 |


