Definition of gases according to the regulations for dangerous goods. Gases are defined as substances that are either completely gaseous at standard atmospheric pressure and 20 degrees Celsius, or have a vapor pressure greater than 300 kPa at 50 degrees Celsius. This includes a wide range of materials, such as compressed gases, liquefied gases, dissolved gases, and refrigerated liquefied gases. It also encompasses mixtures of one or more gases with one or more vapors of substances of other classes.
The classification also includes items that are charged with a gas, such as aerosols, which are pressurized containers that dispense a mixture of a gas and a liquid or a solid.
Sub-Divisions
 | Division 2.1: Flammable gases |
 | Division 2.2: Non-flammable, non-toxic gases |
 | Division 2.3: Toxic gases |
Reason for Regulation
The regulation of gases is necessary because they can be dangerous if not handled or transported properly. Gases under pressure can be highly reactive or flammable and can pose a risk of explosion, fire or toxic gases release, depending on the type of gas.
Commonly Transported Gases
- Aerosols
- Compressed air
- Hydrocarbon gas-powered devices
- Fire extinguishers
- Gas cartridges
- Fertilizer ammoniating solution
- Insecticide gases
- Refrigerant gases
- Lighters
- Acetylene / Oxyacetylene
- Carbon dioxide
- Helium / helium compounds
- Hydrogen / hydrogen compounds
- Oxygen / oxygen compounds
- Nitrogen / nitrogen compounds
- Natural gas
- Oil gas
- Petroleum gases
- Butane
- Propane
- Ethane
- Methane
- Dimethyl ether
- Propene / propylene
- Ethylene