IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

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 Solubility System: Acetonitrile with Carbon disulfide

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Components:
   (1) Acetonitrile; C2H3N; [75-05-8]  NIST Chemistry WebBook for detail
   (2) Carbon disulfide; CS2; [75-15-0]  NIST Chemistry WebBook for detail

Evaluator:
   Valerii P. Sazonov, Technical University, Samara, Russia, August, 2001

Critical Evaluation:

           Solubilities in the system comprising acetonitrile and carbon disulfide have been reported in four publications.
        Poppe¹ determined the upper critical solution temperature and the effect of pressure (0.58 to 9.8 MPa) by the synthetic method. Dorby² determined the upper critical solution temperature. Mutual solubility of (1) and (2) was studied also by Govindaraian et al.³ between 320 and 323 K by the visual observation method. Sivaraman et al.⁴ between 319 and 324 K and between 0.1 and 4.05 MPa measured the mutual solubilities of (1) and (2) using the synthetic method and these data were reported in graphical form, numerical data were extracted from the published graphs for this evaluation.
        The upper critical solution temperature has been reported as 323.36 K^3-4, 324.05 K¹ and 324.2 K². The data^1-3 are in reasonable agreement and thus their average value: UCST = 323.7 ±0.4 K is recommended. The corresponding critical solution composition has been reported in as x_cl = 0.408³ and x_cl = 0.409⁴. These data give an average x_cl = (0.408 ± 0.001), which is recommended.
        The value of dT_c/dP was reported to be 0.0197 K·kPa^-1 by Poppe¹ and be 0.247 K·MPa^-1 by Sivaraman et al.⁴
        All experimental values reported in Govindaraian et al.³ and Sivaraman et al.⁴ 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 = 0.7194, a₂= 1.5113, b₁ = 10.9953, b₂ = –6.4110

(mean standard error of estimate was 0.0115).
        For approximation x_cl and UCST from data^3,4 have been used. In the opinion of the evaluator, 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 points reported in the data,^3,4 are also presented in Fig. 3.
        Solubilities in the system comprising acetonitrile and carbon disulfide have been reported in four publications.
        Poppe¹ determined the upper critical solution temperature and the effect of pressure (0.58 to 9.8 MPa) by the synthetic method. Dorby² determined the upper critical solution temperature. Mutual solubility of (1) and (2) was studied also by Govindaraian et al.³ between 320 and 323 K by the visual observation method. Sivaraman et al.⁴ between 319 and 324 K and between 0.1 and 4.05 MPa measured the mutual solubilities of (1) and (2) using the synthetic method and these data were reported in graphical form, numerical data were extracted from the published graphs for this evaluation.
        The upper critical solution temperature has been reported as 323.36 K^3-4, 324.05 K¹ and 324.2 K². The data^1-3 are in reasonable agreement and thus their average value: UCST = 323.7 ±0.4 K is recommended. The corresponding critical solution composition has been reported in as x_cl = 0.408³ and x_cl = 0.409⁴. These data give an average x_cl = (0.408 ± 0.001), which is recommended.
        The value of dT_c/dP was reported to be 0.0197 K·kPa^-1 by Poppe¹ and be 0.247 K·MPa^-1 by Sivaraman et al.⁴
        All experimental values reported in Govindaraian et al.³ and Sivaraman et al.⁴ 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 = 0.7194, a₂= 1.5113, b₁ = 10.9953, b₂ = -6.4110

(mean standard error of estimate was 0.0115).
        For approximation x_cl and UCST from data^3,4 have been used. In the opinion of the evaluator, 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 points reported in the data,^3,4 are also presented in Fig. 3.

Experimental Data:   (Notes on the Nomenclature)

Interpolated mutual solubility of acetonitrile and carbon disulfide

T/K	102 * Mass Fraction w1	Mole Fraction x1	Comment(s)
318.2	11.2	0.189	Carbon disulfide-rich phase
319.2	12.1	0.204	Carbon disulfide-rich phase
320.2	13.3	0.222	Carbon disulfide-rich phase
321.2	14.9	0.245	Carbon disulfide-rich phase
322.2	17.2	0.278	Carbon disulfide-rich phase
322.7	18.9	0.302	Carbon disulfide-rich phase
322.8	19.4	0.308	Carbon disulfide-rich phase
322.9	19.9	0.315	Carbon disulfide-rich phase
323.0	20.5	0.323	Carbon disulfide-rich phase
323.1	21.1	0.332	Carbon disulfide-rich phase
323.2	22.1	0.345	Carbon disulfide-rich phase
323.3	23.5	0.363	Carbon disulfide-rich phase
318.2	50.7	0.656	Acetonitrile-rich phase
319.2	-	-	Acetonitrile-rich phase
320.2	44.8	0.601	Acetonitrile-rich phase
321.2	41.6	0.569	Acetonitrile-rich phase
322.2	38.0	0.532	Acetonitrile-rich phase
322.7	35.7	0.507	Acetonitrile-rich phase
322.8	35.1	0.501	Acetonitrile-rich phase
322.9	34.6	0.495	Acetonitrile-rich phase
323.0	33.9	0.487	Acetonitrile-rich phase
323.1	33.1	0.479	Acetonitrile-rich phase
323.2	32.2	0.468	Acetonitrile-rich phase
323.3	30.7	0.451	Acetonitrile-rich phase

View Figure 3 for this Evaluation

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

   1  Poppe, G., Bull. Soc. Chim. Belg. 44, 640 (1935).
   2  Dorby, A., Makromol. Chem. 18/19, 317 (1956).
   3  Govindaraian, K.; Subramanyam, S.V.; Gopal, E.S.R., J. Chem. Phys. 56, 4235 (1972).
   4  Sivaraman, A.; Tiwari, M.K.; Jyothi, S.; Gopal, E.S.R., Ber. Bunsen-Ges. Phys. Chem. 84, 196 (1980).

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