A composition comprising 1,3,3,3-tetrafluoropropene (HFO-1234ze) and one or more compounds selected from the group consisting of 1,1,1,2-Tetrafluoroethane (HFC-134a), Difluoroethane (HFC-152a), water, 1,1,1,2,3,3,3-Heptafluoropropane (HFC-227ea), 1,1,1,3,3-pentafluoropropane (HFC-245fa), 1,1,1,3,3-pentafluorobutane (HFC-365mfc), water and CO 2 .