Class 2 Dangerous Goods - Gases

Class 2 Dangerous Goods - Gases


Class 2 Dangerous Goods - Gases are defined by dangerous goods regulations as substances which have a vapour pressure of 300 kPa or greater at 50°c or which are completely gaseous at 20°c at standard atmospheric pressure, and items containing these substances.

DG class 2 encompasses dangerous items such as compressed gases, liquefied gases, dissolved gases, refrigerated liquefied gases, mixtures of one or more gases with one or more vapours of substances of other classes, articles charged with a gas and aerosols.

Gases are capable of posing serious hazards due to their flammability, potential as asphyxiants, ability to oxidize and/or their toxicity or corrosiveness to humans.

Class 2 Dangerous Goods - Sub-Divisions 

  1. Division 2.1: Flammable gases.
  2. Division 2.2: Non-flammable, non-toxic gases.
  3. Division 2.3: Toxic gases.

Class 2 Dangerous Goods - Divisions and the Hazard Labels : 

Division 2.1: Flammable gases 

Any gas which, when mixed with air in certain proportions, form a flammable mixture.  


hazard class 2.1 label
Flammable Gas 2.1 Label


BUTANE , UN 1011 

Division 2.2: Non-flammable, Non-Toxic Gases 

Any non - flammable gas, Non-toxic gas or low temperature liquefied gas. 


DG 2.2 Label
Non Flammable Gas Label 2.2



Division 2.3: Toxic Gases 

Gases which: are known to be so toxic or corrosive to humans as to pose a risk to health. 


class 2.3 hazmat
Class 2.3 hazmat



The following are examples of Class 2 Dangerous Goods – Gases 

  1. Aerosols.
  2. Compressed air.
  3. Hydrogen / hydrogen compounds.
  4. Nitrogen / nitrogen compounds.
  5. Lighters.
  6. Helium / helium compounds.
  7. Hydrocarbon gas powered devices.
  8. Natural gas, Oil gas, Petroleum gases.
  9. Insecticide gases.
  10. Fertilizer ammoniating solution.
  11. Gas cartridges.
  12. Fire extinguishers.

Dangerous Goods Hazard Classes – Additional list for reading:

  1. DG Class 1 Explosives.
  2. DG Class 3 Flammable Liquids.
  3. DG Class 4 Flammable solids; substances liable tospontaneous combustion; substances which, in contact with water, emit flammable gases.
  4. DG Class 5 Oxidizing substances and organic peroxides.
  5. DG Class 6 Toxic and Infectious substances.
  6. DG Class 7 Radioactive material.
  7. DG Class 8 Corrosive substances.
  8. DG Class 9 Miscellaneous dangerous substances and articles, including environmentally hazardous substances.

See this video which will give you examples about Class 2 dangerous goods: 

Maged Saeed AL-Hadabi

I’m Instructor / Maged Saeed Al-Hadabi. ​ Air Cargo / IATA Dangerous Goods Regulations / Safety Management System Senior Instructor, Auditor [ Yemen Airways] . Approved IATA DGR/ SMS Instructor by Yemen Civil Aviation Authority. We hope you find Aviation Professional website not only informative, but interesting and helpful as well. Leave your comment , thank you.

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