The refrigerant R 134a is an HFC with a not relevant ODP potential. It can be used both pure as well as in blends thereof. It is considered as one potential solution to substitute CFC and HCFC refrigerants. It can be used at medium and high temperatures. For its energy efficiency and refrigerating capacity, the refrigerant R 134a is considered as a possible alternative to the refrigerant R 12 in a wide range of applications.