Carbon dioxide / CO₂

Carbon dioxide

Gas Identification

Other denomination
Carbon dioxide
CAS Registry Number
SCBA type

Chemical properties

Molecular formula
Molecular mass
44 g/mol

Physical properties

Boiling point
-56,6 °C
Autoignition temperature
Gas/Vapour density
13,77 eV

Flammability limit


Threshold limit value

5000 ppm • 9000 mg/m³

Carbon dioxide : Description and use


Carbon dioxide is a component that is naturally present in air. Nevertheless, in high concentrations, it can cause asphyxiation by displacing the oxygen in the air required for breathing. When the concentration of carbon dioxide reaches 7.2% (72,000 ppm), the rate of oxygen in the air decreases to 19.5%. This concentration corresponds to the value defined in article 40 of the Registre Santé et Sécurité au Travail (French occupational health and safety records) regarding the minimum percentage of oxygen in terms of volume in the air at all work stations within a company.
Under normal temperature and pressure conditions it is a colourless, odourless gas with a pungent taste. It comes in the form of a liquefied-compressed, colourless and odourless gas.

Flammability: This product is not flammable.
Explosiveness: This product is not explosive.

  • Refrigeration
  • Carbonated drinks
  • Aerosol propellant
  • Chemical intermediate (carbonates, synthetic fibres, p-Xylene, etc.)
  • Low-temperature testing
  • To extinguish fires
  • Inert atmospheres
  • Water treatment
  • To enrich the air in greenhouses
  • To fracture and acidify oil wells
  • Shielding gas in welding

Carbon dioxide : Warnings and caution

GHS hazard statements

H280 - Contains gas under pressure; may explode if heated.

GHS precautionary statements

P403 - Store in a well-ventilated place.
P410 - Protect from sunlight.

SGH04 : Gaz sous pression