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])