At the UCST, the only temperature where direct comparison of independently measured data is possible, the reported values are in rather poor agreement: Schmid et al.¹ (354.7 K) and Zhuravleva et al.^2,3 (356.7 K). Accordingly, in the absence of confirmatory studies, all data must be regarded as tentative. However, it may be noted that the UCST values of Schmid et al.¹ in well characterized systems are generally lower than other reports and thus the value from Zhuravleva, et al.^2,3 is probably more realistic. The corresponding critical solution composition has been reported^2,3 as x_c1 = 0.885, 100 w₁ = 66.0. Monotectic equilibrium has been reported to occur at 316.7 K (Zhuravleva, et al.^2,3).

From the relationship of UCST and critical solution composition in the nitromethane - alcohol series, discussed at the beginning of this volume, the calculated values are 356.2 K and 0.871, respectively. These calculated values, consistent in the series, are recommended and they have been used further for approximation of model parameters. The experimental data reported in Zhuravleva, et al.,^2,3 measured in the same laboratory, have been approximated (with the same weighing factor) by the equation based on scaling law (described in the Introduction material to this volume "Relations of Solubility Data in Binary Systems Containing Nitromethane") and the following parameters have been adjusted:

(mean standard error of estimate was 0.0355). In the opinion of the evaluators, the mutual solubilities calculated by this equation may be treated as tentative.

The calculated solubilities, for the selected temperatures, are given in the following table, while the graphical representation of this relationship, together with all experimental points,^2,3 is presented in Fig. 34 .

Experimental Data:   (Notes on the Nomenclature)