IMO Classes and Labels

The IMO deals with various aspects of the regulation of international commercial shipping, encouraging cooperation among governments in a wide variety of technical matters. In addition, the agency supports high standards in maritime safety, promotes efficient navigation, and encourages the control and prevention of marine pollution.

 

IMO Classes 

 

IMO Class

IMO 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

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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