The solubility temperatures of the liquid phases were determined in ternary mixtures with a constant mass relationship of (1) and (3) as 10.0:90.0, 20.0:80.0, 30.1:69.9, 40.0:60.0, 50.0:50.0, 60.0:40.0, 80.0:20.0, 84.5:15.5, and 89.9:10.1, respectively. These data were also reported in a graphical form.The compositions of two coexistent liquid phases at 20 °C are presented in graphical form.