Classes of hazard	Groups of substances belonging to the classes
1	Explosives and explosive articles
2	Gases
3	Volatile flammable liquids
4.1	Highly inflammable solid substances
4.2	Substances able for spontaneous ignition
4.3	Substances emitting highly inflammable gases while coming into contact with water
5.1	Oxidizing agent
5.2	Organic peroxides
6.1	Toxic substances
6.2	Infectious substances
7	Radioactive material
8	Corroding agents
9	Other dangerous substances and goods