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CLASS 1 - EXPLOSIVES
1.1 Class 1 comprises:

.1 Explosive substances (a substance which is not itself an explosive but which can form an explosive atmosphere of gas, vapour or dust is not included in class 1), except those which are too dangerous to transport or those where the predominant hazard is one appropriate to another class;

.2 Explosive articles, except devices containing explosive substances in such quantity or of such a character that their inadvertent or accidental ignition or initiation during transport should not cause any effect external to the device either by projection, fire, smoke, heat or loud noise; and

.3 Substances and articles not mentioned under .1 and .2, which are manufactured with a view to producing a practical, explosive or pyrotechnic effect.


Transport of explosive substances, which are unduly sensitive, or so reactive as to be subject to spontaneous reaction, is prohibited.

For the purposes of this Code, the following definitions apply:

.1 Explosive substance means a solid or liquid substance (or a mixture of substances), which is in itself capable by chemical reaction of producing gas at such a temperature and pressure and at such a speed as to cause damage to the surroundings. Pyrotechnic substances are included even when they do not evolve gases.

.2 Pyrotechnic substance means a substance or a mixture of substances designed to produce an effect by heat, light, sound, gas or smoke or a combination of these as the result of non-detonative self-sustaining exothermic chemical reactions.

.3 Explosive article means an article containing one or more explosive substances.

.4 Mass explosion means one which affects almost the entire load virtually instantaneously.


1.2 Hazard divisions: The six hazard divisions of class 1 are:

Division 1.1 Substances and articles that have a mass explosion hazard

Division 1.2 Substances and articles that have a projection hazard but not a mass explosion hazard

Division 1.3 Substances and articles that have a fire hazard and either a minor blast hazard or a minor projection hazard or both, but not a mass explosion hazard

This division comprises substances and articles:

.1 which give rise to considerable radiant heat; or

.2 which burn one after another, producing minor blast or projection effects or both.

Division 1.4 Substances and articles that present no significant hazard


This division comprises substances and articles that present only a small hazard in the event of ignition or initiation during transport. The 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.

Note: Substances and articles in this division are in compatibility group S if they are so packaged or designed that any hazardous effects arising from the accidental functioning are confined within the package unless the package has been degraded by fire, in which case all blast or projection effects are limited to the extent that they do not significantly hinder fire fighting or other emergency response efforts in the immediate vicinity of the package.

Division 1.5 Very insensitive substances that have a mass explosion hazard

This division comprises substances that 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.

Note: The probability of transition from burning to detonation is greater when large quantities are transported in a ship. As a consequence, the stowage provisions for explosive substances in division 1.1 and for those in division 1.5 are identical.

Division 1.6 Extremely insensitive articles that do not have a mass explosion hazard

This division comprises articles which contain only extremely insensitive detonating substances and which demonstrate a negligible probability of accidental initiation or propagation.

Note: The risk from articles of division 1.6 is limited to the explosion of a single article.

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