IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Acetonitrile with Alkanes

Components:
   (1) Alkanes; CC5H12 - C18H38; []  NIST Chemistry WebBook for detail
   (2) Acetonitrile; C2H3N; [75-05-8]  NIST Chemistry WebBook for detail

Original Measurements:
   McLure, I.A.; Rodriguez, A.T.; Ingham, P.A.; Steele, J.F., Fluid Phase Equilib. 8, 271 (1982).

Variables:
   Temperature = 341 K to 426 K

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

Experimental Data:   (Notes on the Nomenclature)

Upper critical solution temperatures (USCT) and critical solution compositions (x_1c) of the systems acetonitrile (1) + alkane (2)
t/°C	T/K	Chemical Name	Mole Fraction x₁
68.0	341.2	Pentane; C5H12; [109-66-0], Source and grade: Fisons; A. R., Purity (mol %) >99	-
77.0	350.2	Hexane; C6H14; [110-54-3], Source and grade: Fisons; S. L. R., Purity (mol %) >99	-
84.8	358.0	Heptane; C7H16; [142-82-5], Source and grade: Fisons; S. L. R., Purity (mol %) >99.5	0.63
91.9	365.1	Octane; C8H18; [111-65-9], Source and grade: Fisons; S. L. R., Purity (mol %) >99.5	0.67
101.0	374.2	Nonane; C9H20; [111-84-2], Source and grade: Phillips Petroleum; Research, Purity (mol %) 99.31	0.70
108.5	381.7	Decane; C10H22; [124-18-5], Source and grade: Phillips Petroleum; Pure, Purity (mol %) >99	0.75
113.0	386.2	Undecane; C11H24; [1120-21-4], Source and grade: Phillips Petroleum; Research, Purity (mol %) 99.97	0.77
125.0	398.2	Dodecane; C12H26; [112-40-3], Source and grade: Fisons; S. L. R., Purity (mol %) >99	-
130.5	403.7	Tetradecane; C14H30; [629-59-4], Source and grade: Phillips Petroleum; Pure, Purity (mol %) >99	-
147.0	420.2	Hexadecane; C16H34; [544-76-3], Source and grade: Koch-Light; Puriss., Purity (mol %) >99	-
153.0	426.2	Octadecane; C18H38; [593-45-3], Source and grade: B. Newton Maine Ltd., Purity (mol %) 99	-

Method/Apparatus/Procedure:
   The synthetic method was used. The UCST was determined in Pyrex tubes of samples containing approximately equal volumes of the two components, the exact amounts being determined by weight. Each sample was thoroughly degassed by several freeze-pump-thaw cycles before being sealed off under vacuum. The heating and cooling rates close to the phase transition were ± 0.1 K·min^-1. The mixtures were stirred by means of a couple of stainless-steel ball bearings activated magnetically. The measurement of temperature was carried out at ambient temperature and above using a mercury-in-glass thermometer.

Source and Purity of Materials:
   (1) Fisons; S. L. R.; purity > 99 mol. %; dried and redistilled before use.
   (2) Dried and redistilled.

Estimated Errors:

   Temperature: ± 0.5 K.