A refrigerating composition composed of a hydrofluorocarbon component consisting of 1, 1,, 2- tetrafluoroethane (R 134a) and pentafluoroethane (R 125), in which the weights of R 125 and R134a are in the range of: R 125 1-17 % R 134a 99-83% and an additive selected from a saturated hydrocarbon or mixture thereof with a boiling point in the range of ¿5 to + 70 ° C, in which the hydrocarbon additive is selected from n-pentane, isopentane, cyclopentane and mixtures thereof.
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