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Class 1. Explosives
Subclass 1.1Subclass 1.1

Consists of explosives that have a mass explosion hazard. A mass explosion is one which affects almost the entire load instantaneously.

Subclass 1.2Subclass 1.2

Consists of explosives that have a projection hazard but not a mass explosion hazard.

Subclass 1.3Subclass 1.3

Consists of explosives that have a fire hazard and either a minor blast hazard or a minor projection hazard or, both but not a mass explosion hazard.

Subclass 1.4Subclass 1.4

Consists of explosives that present a minor explosion hazard. The explosive effects are largely confined to the package and no projection of fragments of appreciable size or range is to be expected. An external fire must not cause virtually instantaneous explosion of almost the entire contents of the package.

Subclass 1.5Subclass 1.5

Consists of very insensitive explosives. This division is comprised of substances which have a mass explosion hazard but are so insensitive that there is very little probability of initiation or of transition from burning to detonation under normal conditions of transport

Subclass 1.6Subclass 1.6

Consists of extremely insensitive articles which do not have a mass explosive hazard. This division is comprised of articles which contain only extremely insensitive detonating substances and which demonstrate a negligible probability of accidental initiation or propagation

Class 2: Gases.
Class 3: Flammable Liquids.
Class 4.1: Flammable Solids or Substances.
Class 4.2: Flammable solids.
Class 4.3: Substances which, in contact with water, emit flammable gases.
Class 5.1: Oxidizing substances (agents) by yielding oxygen increase the risk and intensity of fire.
Class 5.2: Organic peroxides - most will burn rapidly and are sensitive to impact or friction.
Class 6.1: Toxic substances.
Class 6.2: Infectious substances.
Class 7: Radioactive Substances.
Class 8: Corrosives.
Class 9: Miscellaneous dangerous substances and articles.

IMO Classes for Dangerous Goods

The Carriage of dangerous goods and marine pollutants in sea-going ships is respectively regulated in the International Convention for the Safety of the Life at Sea (SOLAS) and the International Convention for the Prevention of pollution from Ships (MARPOL).

Relevant parts of both SOLAS and MARPOL have been worked out in great detail and are included in the International Maritime Dangerous Goods (IMDG) Code, thus making this Code the legal instrument for maritime transport of dangerous goods and marine pollutants. As of 1st January 2004, the IMDG Code will become a mandatory requirement.

Classification of dangerous goods

For all modes of transport (sea, air, rail, road and inland waterways) the classification (grouping) of dangerous goods, by type of risk involved, has been drawn up by the UNITED NATIONS Committee of Experts on the Transport of Dangerous Goods (UN).

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