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