Sinegubova¹ studied the mutual solubilities of acetonitrile (1) and pentane (2) between 298 and 341K by the synthetic method. Rakotondramanama et al.² measured the mutual solubilities of (1) and (2) by the titration method between 298 and 303 K. McLure et al.³ determined the upper critical solution temperature of (1) and (2) by the synthetic method.

        The upper critical solution temperature has been reported as 341.2 K³ and 341.4 K.¹ These data are in reasonable agreement and thus their average value: UCST = 341.3 ± 0.1 K is recommended. The corresponding critical solution composition has been not reported but was calculated by the evaluators from reported data¹ to be x_cl = 0.53.

        Reported^1,2 experimental values 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:

(mean standard error of estimate was 0.0036).
        For approximation x_cl and UCST determined by Sinegubova¹ 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 data^1,2 are also presented in Fig. 6.
        Solubilities in the system comprising acetonitrile and pentane have been reported in three publications.

        Sinegubova¹ studied the mutual solubilities of acetonitrile (1) and pentane (2) between 298 K and 341K by the synthetic method. Rakotondramanama et al.² measured the mutual solubilities of (1) and (2) by the titration method between 298 K and 303 K. McLure et al.³ determined the upper critical solution temperature of (1) and (2) by the synthetic method.

        The upper critical solution temperature has been reported as 341.2 K³ and 341.4 K.¹ These data are in reasonable agreement and thus their average value: UCST = 341.3 ± 0.1 K is recommended. The corresponding critical solution composition has been not reported but was calculated by the evaluators from reported data¹ to be x_cl = 0.53.

        Reported^1,2 experimental values 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:

(mean standard error of estimate was 0.0036).
        For approximation x_cl and UCST determined by Sinegubova¹ 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 data^1,2 are also presented in Fig. 6.

Experimental Data:   (Notes on the Nomenclature)