IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

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 Solubility System: Acetonitrile with Decane

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Components:
   (1) Decane; C10H22; [124-18-5]  NIST Chemistry WebBook for detail
   (2) Acetonitrile; C2H3N; [75-05-8]  NIST Chemistry WebBook for detail

Evaluator:
   Valerii P. Sazonov and Nikolai V. Sazonov, Technical University, Samara, Russia, November, 2001

Critical Evaluation:

           Solubilities in the system comprising acetonitrile (1) and decane (2) have been reported in four publications. Francis¹ reported the upper critical solution temperature. Schmid et al.² determined the upper critical solution temperature by the synthetic method. McLure et al.³ measured of the upper critical temperature solution and critical solution composition of components (1) and (2) during as study of solubilities of acetonitrile with alkanes (C₅-C₁₈). Antosik et al.⁴ studied the mutual solubility of (2) and (1) between 295 to 380 K by an synthetic method.
        The upper critical solution temperature has been reported as 380.46 K,⁴ 380.7 K,^1,2 and 381.7 K,³ these data are in reasonable agreement and thus their average value: UCST = 380.9 ± 0.5 K and is recommended. The corresponding critical solution composition has been reported as x_cl = 0.7143⁴ and x_cl = 0.75.³
        All experimental values reported⁴ have been approximated by an equation based on the scaling law (described in the introduction to this volume) for which the following parameters have been derived:

a₁ = 0.8399, a₂= -0.1090, b₁ = 3.9660, b₂ = -4.1114

(mean standard error of estimate was 0.0173).
        For approximation x_cl and UCST from Antosik et al.⁴ have been used. In the opinion of the evaluators, the mutual solubilities calculated by this equation may be treated as tentative. The results of calculations for the selected temperatures are presented in the following table. This relationship, together with experimental results,⁴ are also presented in Fig. 11.
        Solubilities in the system comprising acetonitrile (1) and decane (2) have been reported in four publications. Francis¹ reported the upper critical solution temperature. Schmid et al.² determined the upper critical solution temperature by the synthetic method. McLure et al.³ measured of the upper critical temperature solution and critical solution composition of components (1) and (2) during as study of solubilities of acetonitrile with alkanes (C₅-C₁₈). Antosik et al.⁴ studied the mutual solubility of (2) and (1) between 295 K to 380 K by an synthetic method.
        The upper critical solution temperature has been reported as 380.46 K,⁴ 380.7 K,^1,2 and 381.7 K,³ these data are in reasonable agreement and thus their average value: UCST = 380.9 ± 0.5 K and is recommended. The corresponding critical solution composition has been reported as x_cl = 0.7143⁴ and x_cl = 0.75.³
        All experimental values reported⁴ have been approximated by an equation based on the scaling law (described in the introduction to this volume) for which the following parameters have been derived:

a₁ = 0.8399, a₂= -0.1090, b₁ = 3.9660, b₂ = -4.1114

(mean standard error of estimate was 0.0173).
        For approximation x_cl and UCST from Antosik et al.⁴ have been used. In the opinion of the evaluators, the mutual solubilities calculated by this equation may be treated as tentative. The results of calculations for the selected temperatures are presented in the following table. This relationship, together with experimental results,⁴ are also presented in Fig. 11.

Experimental Data:   (Notes on the Nomenclature)

Calculated mutual solubility of acetonitrile (1) and decane (2)

T/K	102 * Mass Fraction w1	Mole Fraction x1	Comment(s)
293.2	0.9	0.030	Hydrocarbon-rich phase
303.2	1.7	0.057	Hydrocarbon-rich phase
313.2	2.7	0.087	Hydrocarbon-rich phase
323.2	3.8	0.121	Hydrocarbon-rich phase
333.2	5.2	0.161	Hydrocarbon-rich phase
343.2	7.0	0.208	Hydrocarbon-rich phase
353.2	9.4	0.264	Hydrocarbon-rich phase
363.2	12.8	0.337	Hydrocarbon-rich phase
368.2	15.2	0.384	Hydrocarbon-rich phase
373.2	18.7	0.444	Hydrocarbon-rich phase
378.2	25.4	0.541	Hydrocarbon-rich phase
379.2	28.1	0.575	Hydrocarbon-rich phase
379.7	30.0	0.598	Hydrocarbon-rich phase
380.2	33.4	0.635	Hydrocarbon-rich phase
380.3	34.6	0.647	Hydrocarbon-rich phase
380.4	36.5	0.666	Hydrocarbon-rich phase
293.2	99.9	0.999	Acetonitrile-rich phase
303.2	97.6	0.993	Acetonitrile-rich phase
313.2	95.0	0.985	Acetonitrile-rich phase
323.2	92.5	0.977	Acetonitrile-rich phase
333.2	89.7	0.968	Acetonitrile-rich phase
343.2	86.8	0.958	Acetonitrile-rich phase
353.2	83.2	0.945	Acetonitrile-rich phase
363.2	78.6	0.927	Acetonitrile-rich phase
368.2	75.4	0.914	Acetonitrile-rich phase
373.2	70.7	0.893	Acetonitrile-rich phase
378.2	61.9	0.849	Acetonitrile-rich phase
379.2	58.3	0.829	Acetonitrile-rich phase
379.7	55.8	0.814	Acetonitrile-rich phase
380.2	51.6	0.787	Acetonitrile-rich phase
380.3	50.1	0.777	Acetonitrile-rich phase
380.4	47.7	0.760	Acetonitrile-rich phase

View Figure 11 for this Evaluation

References: (Click a link to see its experimental data associated with the reference)

   1  Francis, A.W., Critical Solution Temperature, Washington, Adv. Chem. Ser. 31 (1961).
   2  Schmid, H.H.O.; Mangold, H.K.; Lundberg, W.O.; J. Am. Oil Chem. Soc. 42, 372 (1965).
   3  McLure, I.A.; Rodriguez, A.T.; Ingham, P.A.; Steele, J.F., Fluid Phase Equilib. 8, 271 (1982).
   4  Antosik, M.; Stafiej, A.; Stryjek, R., Fluid Phase Equilib. 58, 325 (1990).

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Last updated: February 18, 2015 (Created: August 17, 2007)