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R744 (CO2)

R744 (CO2) is refrigerant grade CO2, used as a replacement for R134a and R404A in ultra-low, low, and medium temperature refrigeration applications. R744 (CO2) is becoming increasingly popular due to its excellent properties. With an Ozone Depleting Potential (ODP) of 0 and a Global Warming Potential (GWP) of 1, R744 (CO2) is a natural refrigerant. A‑Gas only sources CO2 that is recovered and not produced, so no new CO2 enters the atmosphere, helping you reduce your carbon footprint further.

Packaging Information


kg liquid


kg vapour



  • Available from A‑Gas wholesale partners - find a supplier for further details
  • Store cylinders in a cool, dry, well-ventilated area, out of direct sunlight
  • A‑Gas operates a returnable cylinder fleet - empty cylinders are to be returned to an A‑Gas wholesale partner
  • For alternative or larger package sizes please contact A‑Gas on 0215518790 or via the Contact Us form


Commercial Refrigeration

Industrial Refrigeration

Transport Refrigeration


*Industrial heat extraction, mobile air conditioning, air-to-water heat pump systems

Product Features and Benefits

  • Refrigerant grade R744 (CO2) is available from A‑Gas in gas (vapour) or liquid form
  • Non-flammable with a safety classification of A1
  • Compressors must be charged with modified polyolester oils - contact the compressor manufacturer for more information
  • Excellent thermodynamic properties and low energy requirements
  • R744 (CO2) can be used alongside other primary refrigerants such as hydrocarbon and ammonia
  • High operating pressures
  • Refrigeration systems that contain R744 (CO2) require strict controls on moisture, oil, and other contaminants - contact A‑Gas should a CO2 analysis be required
  • Ultra-low moisture content, less than 5 ppm
  • Industrial grade R744 (CO2) has an average water content of up to 10 times higher than the R744 (CO2) available from A‑Gas, resulting in the formation of carbonic acid - this can build up and result in corrosion of machinery and pipework 
  • Vapour R744 (CO2) cylinders are available for initial pressurisation of systems, whilst liquid R744 (CO2) provides the required charge your system needs to operate efficiently
  • The information contained within this website is for guidance only - for further system-specific advice please contact us directly