__IMDG code classes

__Class 1 - Explosives

__1.1 Substances and articles which have a mass explosion hazard
__1.2
 Substances and articles which have a projection hazard but not a mass
__1.3
 Substances and articles which have a fire hazard and either a minor blast hazard or a minor
_____projection hazard or both, but not a mass explosion hazard
__1.4
 Substances and articles which present no significant hazard
__1.5 Very insensitive substances which have a mass explosion hazard
__1.6 Extremely insensitive articles which do not have a mass explosion

__Class 2 - Gases: Compressed, Liquefied or Dissolved under Pressure

__2.1 Flammable gases
__2.2 Non-Flammable gases
__2.3 Toxic gases

__Class 3 - Flammable Liquids

__Class 4 - Flammable Solids or Substances

__4.1 Flammable solids
__4.2 Substances liable to spontaneous combustion
__4.3 Substances which, in contact with water, emit flammable gases
Class

__Class 5 - Oxidizing Substances and Organic Peroxides

__5.1 Oxidizing substances (agents) by yielding oxygen increase the risk and intensity of fire
__5.2 Organic peroxides, most will burn rapidly and are sensitive to impact or friction

__Class 6 - Toxic and infectious Substances

__6.1 Toxic substances
__6.2
 Infectious substances

__Class 7 - Radioactive Substances

__Class 8 - Corrosives

__Class 9 - Miscellaneous dangerous substances and articles