TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Content: The composition comprises azeotropic or near-azeotropic composition comprising (wt.%) HFC-1234ye (38-99) and HFC-134 (62-1); HFC-1234ye (1-99) and HFC-236ea (99-1); HFC-1234ye (1-99) and HFC-236fa (99-1); HFC-1234ye (1-99) and HFC-245fa (99-1); HFC-1234ye (1-78) and n-butane (99-22); HFC-1234ye (70-99) and cyclopentane (30-1); HFC-1234ye (1-68) and isobutane (99-32); HFC-1234ye (47-99) and 2-methylbutane (53-1); and HFC-1234ye (57-99) and n-pentane (43-1). Preferred Components: The composition further comprises lubricant comprising polyol esters, polyalkylene glycols, polyvinyl ethers, mineral oil, alkylbenzenes, synthetic paraffins, synthetic naphthenes, and poly( alpha )olefins; tracer comprising hydrofluorocarbons, deuterated hydrocarbons, deuterated hydrofluorocarbons, perfluorocarbons, fluoroethers, brominated compounds, iodated compounds, alcohols, aldehydes, ketones and/or nitrous oxide (N2O); UV fluorescent dye comprising naphthalimides, perylenes, coumarins, anthracenes, phenanthracenes, xanthenes, thioxanthenes, naphthoxanthenes, fluoresceins and/or its derivatives; at least one solubilizing agent comprising hydrocarbons, dimethylether, polyoxyalkylene glycol ethers, amides, ketones, nitriles, chlorocarbons, esters, lactones, aryl ethers, hydrofluoroethers, and 1,1,1-trifluoroalkanes; and stabilizer comprising nitromethane, hindered phenols, hydroxylamines, thiols, phosphites and lactones. The high GWP refrigerant is 1,1,1,2-tetrafluoroethane (R134a), chlorodifluoromethane (R22), 2,2-dichloro-1,1,1-trifluoroethane (R123), trichloromonofluoromethane (R11), 1,1,1,3,3-pentafluoropropane (R245fa), 1,2-dichlorotetrafluoroethane (R114), 1,1,1,3,3,3-hexafluoropropane (R236fa), 2-chloro-1,1,1,2-tetrafluoroethane (R124), dichlorodifluoromethane (R12), difluoromethane/pentafluoroethane (R410A), pentafluoroethane/1,1,1,2-tetrafluoroethane/butane (R417A), pentafluoroethane/ 1,1,1,2-tetrafluoroethane/ isobutane (R422A), pentafluoroethane/ 1,1,1-trifluoroethane (R507A), chlorodifluoromethane/ chloropentafluoroethane (R502) or pentafluoroethane/ 1,1,1-trifluoroethane/ 1,1,1,2-tetrafluoroethane (R404A). The compatibilizer comprises polyoxyalkylene glycol ethers of formula R1((OR2)xOR3)y with molecular weight of 100-300 amu; amides of formulae R1C(O)NR2R3 and cyclo-(R4CON(R5)-) with molecular weight of 100-300 amu; ketones of formula R1C(O)R2 with molecular weight of 70-300 amu; nitriles of formula R1CN with molecular weight of 90-200 amu; chlorocarbons of formula RClx with molecular weight of 100-200 amu; aryl ethers of formula R1OR2 with molecular weight of 100-150 amu; 1,1,1-trifluoroalkanes of formula CF3R1; fluoroethers of formula R1OCF2CF2H, where fluoroethers are derived from fluoroolefins and polyols, the fluoroolefins are of formula CF2=CXY', and polyols are linear or branched, where linear polyols are of formula HOCH2(CHOH)x(CRR')yCH2OH, and branched polyols are of formula C(OH)t(R)u(CH2OH)v(CH2)mCH2OH)w; lactones are of formulae (II), (III), and (IV) with molecular weight of 100-300 amu; and esters of formula R1CO2R2 with molecular weight of 80-550 amu. For R1((OR2)xOR3)y,x=1-3;y=1-4;R1=H and 1-6C aliphatic hydrocarbon radicals and y bonding sites;R2=2-4C aliphatic hydrocarbylene radicals;andR3=H, and 1-6C aliphatic and alicyclic hydrocarbon radicals.Provided that at least one of R1 and R3 is hydrocarbon radicals. For R1C(O)NR2R3 and cyclo-(R4CON(R5)-),R1, R2, R3, R5=1-12C aliphatic and alicyclic hydrocarbon radicals, and 6-12C aromatic radical;andR4=3-12C aliphatic hydrocarbylene radicals.For R1C(O)R2,R1, R2=1-12C aliphatic, alicyclic and aryl hydrocarbon radicals.For R1CN,R1=5-12C aliphatic, alicyclic or aryl hydrocarbon radicals.For RClx,x=1 or 2;andR=1-12C aliphatic and alicyclic hydrocarbon radicals.For R1OR2,R1=6-12C aryl hydrocarbon radicals;andR2=1-4C aliphatic hydrocarbon radicals.For CF3R1,R1=5-15C aliphatic and alicyclic hydrocarbon radicals.For R1OCF2CF2H,R1=5-15C aliphatic, alicyclic, and aromatic hydrocarbon radicals;X=H, Cl or F;Y'=Cl, F, CF3 or ORf';Rf'=CF3, C2F5, or C3F7;R, R'=H, CH3 or C2H5;m, x=0-4;y=0-3;t, u, z=0-1;v, w=0-4;ort+u+v+w=4.R1-R8=H, optionally branched, optionally bicyclic, optionally saturated hydrocarbyl radicals.For R1CO2R2,R1, R2=optionally linear, optionally saturated alkyl and aryl radicals.