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Refrigerant Grade CO₂ (R744)

Refrigerant grade CO₂ (R744) is a high-purity gas with a moisture content of less than 10 parts per million. 

Refrigeration CO₂ systems require tight controls on moisture, oil and other impurities.

Industrial grade CO₂ does not meet this requirement.

Please read our factsheet on CO2 as a refrigerant, or see below for a summary.

Summary of CO₂ as a refrigerant (R744)

The use of CO₂ as a refrigerant dates back to 1850.  R744 is now regaining popularity due to its low environmental impact.

Excellent thermodynamic properties and low energy-use make it suitable for a range of applications, including:

• industrial heat extraction
• chilled warehousing
• shipping vessels
• commercial refrigeration
• mobile air conditioning

R744 is often used as a secondary refrigerant along with ammonia and hydrocarbons, thereby opening up applications where ammonia or hydrocarbons as a single-stage refrigerant would not be applicable.

Properties

• environmentally friendly.  Zero ODP, GWP = 1
• non-flammable
• toxic and an asphyxiant at high concentrations
• odourless and colourless

Refrigerant grade CO₂ is available in a variety of cylinder sizes and drums.  Our most popular sizes are shown in the table below.

This is also available through BOC's Cryospeed™ mini-bulk delivery, and bulk up to 22 tonnes, available from locations across the country.

For those new to working with CO₂ as a refrigerant BOC offers a one day training course

For further information 1890 355 255 or email us