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Carbon Dioxide (CO2) Gas Safety Information


Key Characteristics. These are guidelines only – refer to published documents. OX-AN® cannot be held responsible in any way for the use of this data.

Technical Characteristics of Carbon Dioxide (CO2)

Description: Carbon Dioxide is a natural component of air at approximately 0.03% Increased concentrations of carbon dioxide replace the oxygen content of the air producing an Oxygen Deficient, toxic atmosphere.
Properties: ColourlessOdourlessHeavier than air – Relative density 1.52Acidic taste at high concentrations
Risks: Depletion of the oxygen in the air, causing asphyxiationHeadache, nausea, unconsciousness and death
300 – 400 PPM Typical atmosphere
600 – 800 PPM Acceptable indoor air quality
1,000 PPM Tolerable indoor air quality
5,000 PPM Average exposure limits over 8 hours
6,000 – 30,000 PPM Concern, short exposure only
3 – 8% Increased respiration and heart rate
10% + Nausea, vomiting and unconsciousness
20% + Fast unconsciousness, death

Further information about carbon dioxide can be found here

See our room oxygen monitor page for more information.

Find information about gas density data here