import CoolProp
import CoolProp.CoolProp as CP
fluids = [
["R50", "Methane"],
["R170", "Ethane"],
["R600", "n-Butane"],
["R704", "Helium"],
["R718", "Water"],
["R720", "Neon"],
["R728", "Nitrogen"],
["R729", "Air"],
["R732", "Oxygen"],
["R740", "Argon"],
["R1150", "Ethylene"],
["R1270", "Propylene"]]
for f in fluids:
print("{0}:{1} - {2}:{3}".format(f[0],CP.PropsSI('Tcrit','T',0,'D',0,f[0]),CP.PropsSI('Tcrit','T',0,'D',0,f[1]),f[1]))