At the UCST, the only temperature where direct comparison is possible, the two studies are in rather poor agreement: [Schmid et al.¹ (351.2 K) and Zhuraleva et al.^2,3 (352.7 K).] 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 more realistic.

The results of experimental measurements^2,3 have been verified by the calculated UCST = 352.8 K obtained from the relationship of UCST in the nitromethane - alcohol series and discussed at the beginning of this volume. Critical solution composition was reported in Zhuravleva, et al.^2,3 as x_c1 = 0.849, while the value calculated on the basis of relationship in the series was equal 0.854. These experimental values^2,3 of UCST and critical solution composition are treated as recommended because they are consistent with the respective values calculated in the series. 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 0.0428). 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 all experimental points^2,3 are also presented in Fig. 33 . Monotectic equilibrium^2,3 is reported to occur at 311.7 K.

Experimental Data:   (Notes on the Nomenclature)