IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Acetonitrile with Carbon disulfide

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

Original Measurements:
   Govindaraian, K.; Subramanyam, S.V.; Gopal, E.S.R., J. Chem. Phys. 56, 4235 (1972).

Variables:
   Temperature = 320 K to 323 K

Prepared By:
   Valerii P. Sazonov

Experimental Remarks:

   The mutual solubility of acetonitrile (1) and carbon disulfide (2) in mole fractions was reported over the temperature range in graphical form. Numerical data were extracted from the published graphs by the compiler.

Experimental Data:   (Notes on the Nomenclature)

Mutual solubility of acetonitrile (1) and carbon disulfide (2)
t/°C	T/K	10² * Mass Fraction w₁ (compiler)	Mole Fraction x₁	Comment(s)
47.20	320.35	12.7	0.213	carbon disulfide-rich phase
47.61	320.76	13.6	0.226	carbon disulfide-rich phase
48.26	321.41	-	-	carbon disulfide-rich phase
48.62	321.77	16.0	0.261	carbon disulfide-rich phase
48.79	321.94	-	-	carbon disulfide-rich phase
49.37	322.52	18.0	0.290	carbon disulfide-rich phase
49.43	322.58	-	-	carbon disulfide-rich phase
50.00	323.15	21.2	0.333	carbon disulfide-rich phase
50.14	323.29	22.7	0.353	carbon disulfide-rich phase
50.17	323.32	-	-	carbon disulfide-rich phase
50.19	323.34	25.6	0.389	carbon disulfide-rich phase
50.20	323.35	25.9	0.393	carbon disulfide-rich phase
50.21	323.36	27.1	0.408	carbon disulfide-rich phase
47.20	320.35	-	-	acetonitrile-rich phase
47.61	320.76	-	-	acetonitrile-rich phase
48.26	321.41	42.6	0.579	acetonitrile-rich phase
48.62	321.77	-	-	acetonitrile-rich phase
48.79	321.94	41.0	0.563	acetonitrile-rich phase
49.37	322.52	-	-	acetonitrile-rich phase
49.43	322.58	38.3	0.535	acetonitrile-rich phase
50.00	323.15	-	-	acetonitrile-rich phase
50.14	323.29	-	-	acetonitrile-rich phase
50.17	323.32	30.5	0.449	acetonitrile-rich phase
50.19	323.34	-	-	acetonitrile-rich phase
50.20	323.35	29.2	0.434	acetonitrile-rich phase
50.21	323.36	27.1 (UCST)	0.408	acetonitrile-rich phase

Method/Apparatus/Procedure:
   The synthetic method was used. The visual observation of the phase-transition temperatures has been used as in Viswanathan et al.¹ The samples were all raised to the one phase region, and after allowing them to stand at this temperature for about an hour, gradual cooling in steps of 10 mdeg was started. Deep brown coloration near x_c was observed, when viewed through transmitted light, and the opalescence was very strong because of the large difference in the refractive indices of the liquids. They were reproduced in a slow heating cycle also.

Source and Purity of Materials:
   (1) E. Merck Co., Germany; not purified; water content certified to be less than 0.1 mole %.
   (2) E. Merck Co., Germany; not purified.

Estimated Errors:

   Temperature: ± 0.05 K.

References:
   1. B. Viswanathan, R. D. Gambhir, and E. S. R. Gopal, J. Chem. Phys. 53, 4405 (1970).