Substances and articles which, owing to their inherent properties or their condition during carriage, endanger general safety and order, and in particular property of public importance and the health and lives of people, animals and other living beings, are called dangerous goods.
All known dangerous goods are classified by UN codes.
ADR divides the substances it covers, according to their hazards, into 9 main classes, making a total of 13 classes and subclasses.
- CLASS 1 Explosive substances and articles
- CLASS 2 Gases
- CLASS 3 Flammable liquids
- 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
- CLASS 7 Radioactive material
- CLASS 8 Corrosive substances
- CLASS 9 Miscellaneous dangerous substances and articles
