IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Acetonitrile with Pentane

Components:
   (1) Acetonitrile; C2H3N; [75-05-8]  NIST Chemistry WebBook for detail
   (2) Pentane; C5H12; [109-66-0]  NIST Chemistry WebBook for detail

Original Measurements:
   Sinegubova, S.I., Dissertation, Saratov University 1978.

Variables:
   Temperature = 298 K to 341 K

Prepared By:
   Valerii P. Sazonov and Nikolai V. Sazonov

Experimental Data:   (Notes on the Nomenclature)

Mutual solubility of acetonitrile (1) and pentane (2)
t/°C	T/K	10² * Mass Fraction w₁	Mole Fraction x₁ (compiler)	Comment(s)
25.0	298.2	3.95	0.067	Hydrocarbon-rich phase
34.2	307.4	-	-	Hydrocarbon-rich phase
38.5	311.7	11.1	0.180	Hydrocarbon-rich phase
56.5	329.7	-	-	Hydrocarbon-rich phase
63.9	337.1	-	-	Hydrocarbon-rich phase
64.5	337.7	20.3	0.309	Hydrocarbon-rich phase
67.2	340.4	-	-	Hydrocarbon-rich phase
67.3	340.5	28.7	0.414	Hydrocarbon-rich phase
67.9	341.1	-	-	Hydrocarbon-rich phase
68.2	341.4	32.9	0.463	Hydrocarbon-rich phase
68.2	341.4	-	-	Hydrocarbon-rich phase
25.0	298.2	85.6	0.913	Acetonitrile-rich phase
34.2	307.4	79.3	0.871	Acetonitrile-rich phase
38.5	311.7	-	-	Acetonitrile-rich phase
56.5	329.7	69.7	0.802	Acetonitrile-rich phase
63.9	337.1	60.1	0.726	Acetonitrile-rich phase
64.5	337.7	-	-	Acetonitrile-rich phase
67.2	340.4	52.2	0.658	Acetonitrile-rich phase
67.3	340.5	-	-	Acetonitrile-rich phase
67.9	341.1	43.9	0.579	Acetonitrile-rich phase
68.2	341.4	-	-	Acetonitrile-rich phase
68.2	341.4	-	- (UCST)	Acetonitrile-rich phase

Method/Apparatus/Procedure:
   The synthetic method was used. Sealed ampoules were placed in a glass-walled thermostat. The temperature of the thermostat was increased gradually with periodic stirring and a preliminary determination of the clear-point temperature in every ampoule was made. A more precise value of the cloud-point temperature was determined by allowing the thermostat to cool. The determination was repeated several times.

Source and Purity of Materials:
   (1) Source not specified; pure grade product; distilled over anhydrous soda, boiling point = 81.6 °C, n(20 °C, D) = 1.3441, p(25 °C) = 777 g·L^–1
   (2) Source not specified; for chromatography; not purified; boiling point = 36.0 °C, n(20 °C, D) = 1.3578, p(20 °C) = 626 g·L^–1.

Estimated Errors:

   Temperature: ± 0.2 K.