General chemical and physical properties of R290 and R1270

Overview, Properties of R290 and R1270 compared with R22 and HFC refrigerants.

• Naturally occurring halogen-free hydrocarbons
• without ozone depletion potential ODP.
• with negligible global warming potential GWP.
• R290: odour- and colourless.
• R1270: odour of petroleum, colourless.
• Low toxicity (MAC or AEL 1000 ppm).
• Flammable, forms explosive mixtures with air, Properties of R290 and R1270 compared with R22 and HFC refrigerants.
• Uncritical in connection with conventional metals and elastomers. For R600a (isobutane), elastomers may have restrictions – individual testing required.
  Avoid zinc and aluminium alloys containing more than 2% of magnesium, since otherwise undesirable reactions with oil might occur.