The solubility of 1, 1, 1,2-tetrafluoroethane in triethylene glycol dimethyl ether was measured by the static method in the temperature range (283.15 to 353.15) K Triethylene glycol dimethyl ether was completely miscible with 1,1,1,2-tetrafluorethane in the range of temperatures and pressures studied. All experimental solubility data were correlated by the five-parameter NRTL equation with a very small overall average absolute deviation. This binary system exhibited large negative deviations from Raoult's law.