| abstract |
Provided is a substituent mixed refrigerant of which, when the permissible concentration (OEL) of R1234yf is 200ppm, the OEL of the composition as a whole is at least 400ppm. A refrigerant-containing composition, wherein the refrigerant includes difluoromethane (R32), 2,3,3,3-tetrafluoropropene (R1234yf) and trans-1,3,3,3-tetrafluoropropene (R1234ze(E)), and the mass ratio of the three components is within the range of the region enclosed by the lines a, b, c, d and e that connect the points A, B, C, D and E as depicted in the triangular composition diagram in figure 1 where the three components each serve as a vertex. |