Vapor-liquid equilibrium at 101.3 kPa has been determined for the binary system 2,2’-oxybis[propane] + 1-chlorobutane and the ternary system 2,2’-oxybis[propane] + 1-chlorobutane + cyclohexane. The binary 2,2’-oxybis[propane] + 1-chlorobutane exhibits slight deviations from ideality. The data were correlated by the Redlich-Kister and Wisniak-Tamir equations, and the appropriate parameters are reported. The activity coefficients of the ternary system can be predicted from those of the pertinent binary systems. No ternary azeotrope is present.