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Dangerous cargo classification
Thursday, 17 January 2013 07:48

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



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