The European Agreement concerning the International Carriage of Dangerous Goods by Road (ADR) is an international agreement between the countries regulating the carriage of dangerous goods by road.
Dangerous substances are divided into groups of their
dangers:
1st class - explosive
substances
2nd class - gases
3rd class - flammable liquids
4.1. Class - Flammable solids
4.2.class - self-ignition substances
4.3.class - substances that, when contacted, form flammable gases
5.1.Class - oxidizing substances
5.2. Class - organic peroxides
6.1. Class - toxic substances
6.2. Class - infectious substances
7th class - radioactive substances
8th class - corrosive substances
9. class - various dangerous and toxic substances
Useful links:
https://www.uradni-list.si/1/objava.jsp?sop=2006-01-1350
Database: