The solubility of 2,6-dichloro-4-nitroaniline (DCNA) in 12 pure solvents of n-butanol, n-propanol, methanol, ethylene glycol (EG), ethanol, isopropanol, acetonitrile, cyclohexane, 1,4-dioxane, ethyl acetate, water, and N-methyl pyrrolidone (NMP) was achieved through the shake-flask method at the temperatures from 278.15 to 323.15 K and ambient pressure p = 101.2 kPa. The mole fraction solubility of DCNA in the above solvents increased as the temperature increased and ranked as NMP > 1,4-dioxane > ethyl acetate > acetonitrile > n-butanol > n-propanol > ethanol > EG > isopropanol > methanol > cyclohexane > water. The solvent–solvent and solvent–solute interactions on the DCNA solubility were investigated using the linear solvation energy relationship on the basis of the solvent descriptors. The acquired solubility was correlated using the NRTL model, λh equation, modified Apelblat equation, and Wilson model. The obtained maximum relative average deviation and root-mean-square deviation were 6.53 × 10–2 and 13.73 × 10–4, respectively. In general, the relative average deviation values achieved through the modified Apelblat equation were lower than those with the other three equations for a certain solvent. In addition, the mixing properties, reduced excess enthalpy, and activity coefficient under infinitesimal concentration were derived based on the Wilson model.

Phase equilibria in the Mg-rich region of the Mg-Sn-Ag ternary system were determined by quenching experiments, differential scanning calorimetry, electron probe micro-analysis, and Xray diffraction techniques. No ternary compounds were found in the studied isothermal sections. A critical evaluation of the available experimental data and a thermodynamic optimization of the Mg-Sn-Ag-In quaternary system were carried out using the calculation of phase diagrams method. The modified quasichemical model in the pair approximation was used for the liquid solution, which exhibits a high degree of short-range order. The solid phases were modeled with the compound energy formalism. All available and reliable experimental data were reproduced within experimental error limits. A self-consistent thermodynamic database was constructed for the Mg-Sn-Ag-In quaternary system, which can be used as a guide for Mg-based alloys development.

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