Apart from the publication of Schmid et al.,³ which did not contain sufficient information to justify its inclusion, all the original data are given in the data sheets following this Critical Evaluation.

The following individual points in the alcohol-rich phase, in otherwise satisfactory studies, are in marked disagreement with other studies and have been rejected: 295 K (Ref. 1) and 322 K⁵. All other data are included in Tables 2 and 3 below.

In the tables that follow, values obtained by the evaluator by graphical interpolation or extrapolation from the data sheets are indicated by an asterisk (*). "Best" values have been obtained by simple averaging. The uncertainty limits (σ_n) attached to these "best" values do not have statistical significance and should be regarded only as a convenient representation of the spread of the values and not as error limits. The letter (R) indicates "recommended" data. Data are "recommended" if two or more apparently reliable studies are in reasonable (± 5 % relative) agreement. All other data are regarded as tentative only.

It will be noted from Table 2 that the agreement is only fair among the solubility data reported for the alcohol-rich phase by independent workers. This is reflected in the large σ_n values. On the other hand in the nitromethane-rich phase (Table 3), even though the solubilities are lower, the agreement is much better and a number of values have been recommended.

The upper critical solution temperature has been reported as 336.2 K,¹ 339 K,³ 340.1 K,⁴ and 341.33 K.⁵ In well characterized systems, the UCST values reported by both Francis¹ and Schmid et al.³ are generally lower than those reported in other studies. Accordingly, their data for the present system are rejected.

From the relationships of UCST and critical solution composition in the nitromethane - alcohol series, discussed at the beginning of this volume, the calculated values are 341.5 K and 0.799, respectively. The most realistic experimental UCST = 341.3 K was measured by Sazonov and Filippov⁵ (one of them is the evaluator of this system).

Critical solution composition, reported as x₁ = 0.775,¹ x₁ = 0.794,⁵ and x₁ = 0.808,⁴ are close to the value estimated in the series. This calculated values consistent in the series and experimental data⁵ are recommended and they have been used for approximation of model 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 0.0061).

This relationship is presented in Fig. 31 together with experimental data reported in Markuzin and Nikanorova,² Zhuravleva et al.,⁴ and Sazonov and Filippov.⁵

Experimental Data:   (Notes on the Nomenclature)