scope:

This International Standard specifies thermophysical properties of several commonly used refrigerants and refrigerant blends. This International Standard is applicable to the refrigerants R121), R221), R322), R1231), R1252), R134a2), R143a2), R152a2), R290, R600a, R717 (ammonia), R744 (carbon dioxide), R1233zd(E), R1336mzz(Z), R1234yf and R1234ze(E) and to the refrigerant blends R404A2), R407C2), R410A2), and R507A2). The following properties are included: density, pressure, internal energy, enthalpy, entropy, heat capacity at constant pressure, heat capacity at constant volume, speed of sound, and the Joule-Thomson coefficient, in both single-phase states and along the liquid-vapour saturation boundary. The numerical designation of these refrigerants is that defined in ISO 817.