3 tetrafluoropropene hfc 152a and hfc 32 as hydrofluorocarbons saturated or unsaturated the compositions according to the present invention can be used as heat transfer fluids preferably in compression systems and are particularly suitable for refrigeration preferably as replacement for r404a and hcfc 22 chlorodifluoromethane the compositions according to the present invention are also suitable for compression systems for air conditioning and heating in particular heat pumps preferably as replacement for r407c and hfc 134a the compositions according to the present invention can comprise a stabilizer for 2 3 3 3 tetrafluoropropene the stabilizer represents at most 5 by weight with respect to the total composition mention may in particular be made as stabilizers of nitromethane ascorbic acid terephthalic acid azoles such as tolutriazole or benzotriazole phenolic compounds such as tocopherol hydroquinone t butylhydroquinone or 2 6 di tert butyl 4 methylphenol epoxides alkyl optionally fluorinated or perfluorinated or alkenyl or aromatic such as n butyl glycidyl ether hexanediol diglycidyl ether allyl glycidyl ether or butylphenyl glycidyl ether phosphites phosphates phosphonates or thiols and lactones the compositions according to the present invention can comprise lubricating agents such as mineral oil alkylbenzene polyalkylene glycol and polyvinyl ether the compositions according to the present invention can additionally be used as blowing agents aerosols and solvents the performances of the compositions according to the invention under refrigeration operating conditions are given in table 1 the values of the constituents 1234yf 32 and 152a for each composition.