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IUPAC-NIST Solubility Database
NIST Standard Reference Database 106
Solubility System:
Acetonitrile with 1,4-Benzenediol (hydroquinone)
Components:
(1) 1,4-Benzenediol (hydroquinone); C6H6O2; [123-31-9]
NIST Chemistry WebBook
for detail
(2) Acetonitrile; C2H3N; [75-05-8]
NIST Chemistry WebBook
for detail
Original Measurements:
Chekhova, G.N., Dissertation, Novosibirsk Institute of Inorganic Chemistry, 1975.
Variables:
Temperature = 229 K to 444 K
Prepared By:
Valerii P. Sazonov and Nikolai V. Sazonov
Experimental Remarks:
No region of liquid-liquid immiscibility was observed. A full solid-liquid phase diagram in mole percent over the specified temperature range was reported in the original publication. A eutectic was reported at –44.5 °C (228.7 K, compilers) at x
1
= 0.975 (100 w
1
= 93.6, compilers).
Experimental Data:
(Notes on the Nomenclature)
Melting temperatures of acetonitrile (1) and 1,4-benzenediol (2) system
t/°C
T/K
10
2
* Mass Fraction w
1
(compiler)
Mole Fraction x
1
170.3
443.5
0.0
0.000
169.9
443.1
0.4
0.011
169.2
442.4
1.9
0.049
166.5
439.7
4.4
0.109
163.3
436.5
6.5
0.157
161.2
434.4
8.1
0.192
156.5
429.7
10.5
0.240
156.0
429.2
10.8
0.246
149.1
422.3
16.2
0.341
142.0
415.2
19.6
0.396
134.0
407.2
23.7
0.454
124.1
397.3
29.0
0.523
103.7
376.9
39.3
0.625
97.5
370.7
44.1
0.679
91.1
364.3
48.9
0.720
89.8
363.0
50.7
0.734
70.1
343.3
65.0
0.833
50.0
323.2
76.1
0.895
20.0
293.2
88.1
0.952
-44.5
228.7
93.6
0.975
-43.3
229.9
98.9
0.996
-42.2
231.0
100.0
1.000
Method/Apparatus/Procedure:
The synthetic method was used. Solutions of various compositions were located in glass vessels and placed in a cooling mixture. The change of temperature was measured by the thermocouple. No experimental details given.
Source and Purity of Materials:
(1) Source not specified; for chromatography; not purified; melting point = –42.2 °C.
(2) Source not specified; purified by the recrystallization; melting point = 170.3 °C.
Estimated Errors:
Temperature: ± 0.2 K.