- 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 2.1: flammable gases
- Class 2.2: non-flammable, non-toxic gases
- Class 2.3: toxic gases
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 5.1: oxidizing substances
- Class 5.2: organic peroxides
- Class 6.1: toxic substances
- Class 6.2: infectious substances
The numerical order of the classes and divisions is not that of the degree of danger.
Marine pollutants and wastes
2.0.1.2.1 Many of the substances assigned to classes 1 to 9 are deemed as being marine pollutants (see chapter 2.10). Certain marine pollutants have an extreme pollution potential and are identified as severe marine pollutants (see chapter 2.10).
2.0.1.2.2 Wastes should be transported under the provisions of the appropriate class, considering their hazards and the criteria in the Code. Wastes not otherwise subject to the Code but covered under the Basel Convention* may be transported under class 9. Alternatively, the classification may be in accordance with 7.8.4.
* Basel Convention on the Control of Transboundary Movements of Hazardous Wastes and their Disposal (1989).
2.0.1.3 For packing purposes, substances of all classes, other than classes 1, 2, 5.2, 6.2 and 7 and the self-reactive substances of class 4.1, are assigned to three packing groups in accordance with the degree of danger presented by the substance. The packing groups have the following meanings:
Packing group I: Substances presenting high danger;
Packing group II: Substances presenting medium danger; and
Packing group III: Substances presenting low danger.
The packing group to which a substance is assigned is indicated in the Dangerous Goods List in chapter 3.2.
2.0.1.4 Dangerous goods are determined to present one or more of the dangers represented by classes 1 to 9, marine pollutants and, if applicable, the degree of danger (packing group) on the basis of the provisions in chapters 2.1 to 2.10.
2.0.1.5 Dangerous goods presenting a danger of a single class or division are assigned to that class or division and the packing group, if applicable, determined. When an article or substance is specifically listed by name in the Dangerous Goods List in chapter 3.2, its class or division, its subsidiary risk(s) and, when applicable, its packing group are taken from this list.
2.0.1.6 Dangerous goods meeting the defining criteria of more than one hazard class or division and which are not listed by name in the Dangerous Goods List are assigned to a class or division and subsidiary risk(s) on the basis of the precedence of hazard provisions prescribed in 2.0.3.
2.0.1.7 Marine pollutants and severe marine pollutants are noted in the Dangerous Goods List and identified in the Index