Imo Class Details
For maritime transport these goods, materials or articles are classified and further divided as follows:
IMO Class Description
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 explosion hazard.
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 hazard.
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
3.1 Low flash-point group of liquids (flash-point below -18?C.)
3.2 Intermediate flash-point group of liquids (flash-point of -18?C. up to but not incl. +23?C.)
3.3 High flash-point group of liquids (flash-point of +23?C. up to and incl. +61?C.)
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 5 Oxidizing Substances (agents) 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 *
MHB Materials hazardous only in bulk **
* Marine pollutants which are not of an otherwise dangerous nature are listed in class 9
** The regulations for materials hazardous only in bulk are not applicable to these materials when they are carried in closed freight containers, however, many precautions may have to be observed