IMDG Classification
 
 
International Maritime Dangerous Goods (IMDG) Code
 
The International Maritime Dangerous Goods (IMDG) Code was developed as a uniform international code for the transport of dangerous goods by sea covering such matters as packing, container traffic and stowage, with particular reference to the segregation of incompatible substances.
 
 
Cargo Classification
 
Dangerous goods are often indicated by diamond-shaped signage. The colors of each diamond in a way has reference to its hazard. For instance, Flammable = Red, Explosive = Orange, Non Flammable Non Toxic Gas = Green. Most countries regulate hazardous materials by law, and they are subject to several international treaties as well. Even so, different countries may use different class diamonds for the same product.

Further information and Sea shipment regulations please visit IMDG website
http://www.imo.org/Safety/mainframe.asp?topic_id=158
http://www.imo.org/environment/mainframe.asp?topic_id=1016
 
Classes, divisions, packing groups
 
Substances (including mixtures and solutions) and articles subject to the provisions of this Code are assigned to one of the classes 1-9 according to the hazard or the most predominant of the hazards they present. Some of these classes are subdivided into divisions. These classes or divisions are as listed below:
 
Class 1: Explosives
 
Division 1.1: substances and articles which have a mass explosion hazard
Division 1.2: substances and articles which have a projection hazard but not a mass explosion hazard
Division 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
Division 1.4: substances and articles which present no significant hazard
Division 1.5: very insensitive substances which have a mass explosion hazard
Division 1.6: extremely insensitive articles which do not have a mass explosion hazard
 
Class 2: Gases
 
Class 2.1: flammable gases
Class 2.2: non-flammable, non-toxic gases
Class 2.3: toxic gases
 
Class 3: Flammable liquids
 
Class 4: Flammable solids; substances liable to spontaneous combustion; substances which, in contact with water, emit flammable gases
 
Class 4.1: flammable solids, self-reactive substances and desensitized explosives
Class 4.2: substances liable to spontaneous combustion
Class 4.3: substances which, in contact with water, emit flammable gases
 
Class 5: Oxidizing substances and organic peroxides
 
Class 5.1: oxidizing substances
Class 5.2: organic peroxides
 
Class 6: Toxic and infectious substances
 
Class 6.1: toxic substances
Class 6.2: infectious substances
 
Class 7: Radioactive material
 
Class 8: Corrosive substances
 
Class 9: Miscellaneous dangerous substances and articles
 
The numerical order of the classes and divisions is not that of the degree of danger.
 
Packing Groups
 
Packing groups are used for the purpose of determining the degree of protective packaging required for Dangerous Goods during transportation.
 
Group I :
 
great danger, and most protective packaging required. Some combinations of different classes of dangerous goods on the same vehicle or in the same container are forbidden if one of the goods is Group I
 
Group II : medium danger
 
Group III : least danger among regulated goods, and least protective packaging within the transportation requirement

 
"The numerical order of the classes and divisions is not that of the degree of danger."
 
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