A survey of reported compositions along the solubility curve (soly) and compositions of coexisting liquid phases in equilibrium (equil.) for the system nitromethane + 1-nonanol + naphthalene is given in Table 1.

Solubility data

The system nitromethane + 1-nonanol + naphthalene includes a three-phase region, although only one binary pair of components, nitromethane + 1-nonanol, are partially miscible. The data for this system were compiled and critically evaluated.³ The UCST (upper critical solution temperature) of the binary system nitromethane + 1-nonanol has been reported in Sazonov and Chernysheva¹ as 327.96 K and to agrees with the recommended value in Sazonov et al.³
The solubility temperatures of the liquid and solid phases were determined¹ by the synthetic method in ternary mixtures with constant mass content of naphthalene, and also in ternary mixtures with a constant relationship of (1) and (2). Experimental errors were reported in Sazonov and Chernysheva¹ as ±0.02 K (for liquid phases) and ±0.03 K (for solid phase). Maximal temperature of the three-phase equilibrium was reported to be as 298.1 K (Ref. 1). Between 298.1 K and 327.96 K exist two separate regions of two-phase state, one of them can be described by a band type curve.

Liquid-liquid equilibrium data Compositions of two and three coexisting phases for the ternary system nitromethane + 1-nonanol + naphthalene were determined in Sazonov and Chernysheva² at 293.2 K, 296.2 K and 298.1 K by gas chromatography and presented in Fig. 26 at 296.2 K. Experimental errors were reported as ±0.02 K.
All experimental data are considered tentative.