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IMO Class Details

IMO Class Details

For more detailed information please refer to the IMDG CODE, the Shipping Lines Directives, for the acceptance of Dangerous Goods and Marine Pollutants, or contact the DANGEROUS GOODS DEPARTMENT in Rotterdam.

Please Note: New printed labels of IMO classes 2, 3, 4, 5, 6, 8 and 9 are without text.

For maritime transport these goods, materials or articles are classified and further divided 

as follows:

IMO CLASSDESCIPTION
Class 1Explosives
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 2Gases: Compressed, Liquefied or Dissolved under Pressure.
2.1
  • Flammable gases.
2.2
  • Non-Flammable gases.
2.3
  • Toxic gases.
Class 3Flammable Liquids
Class 4Flammable 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 5Oxidizing 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 6Toxic and Infectious Substances
6.1
  • Toxic substances.
6.2
  • Infectious substances.
Class 7

Radioactive Substances

Class 8Corrosives
Class 9Miscellaneous Dangerous Substances and Articles *
MHBMaterials 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.