Conform legii, orice vehicul care transporta substante periculoase, trebuie sa aiba o eticheta portocalie (cod Kemler) care contine si numarul "UN".
Eticheta arata asa:




Numarul din partea de sus indica "clasa de pericol"

The ADR Hazard Identification Number HIN consists of two or three figures. The first figure of the Kemler Code indicates the primary hazard:
2 Emission of gas due to pressure or chemical reaction
3 Flammability of liquids (vapours) and gases or self-heating liquid
4 Flammability of solids or self-heating solid
5 Oxidizing (fire-intensifying) effect
6 Toxicity
7 Radioactivity
8 Corrosivity
9 Risk of spontaneous violent reaction

The second and third figure generally indicate secondary hazards:
1 the hazard is adequately described by the first figure
2 (flammable) gas may be given off
3 fire risk
4 fire risk
5 oxidizing risk
6 toxic risk
8 corrosive risk
9 risk of spontaneous, violent reaction
Doubling of a figure indicates an intensification of that particular hazard. Where the hazard associated with a substance can be adequately indicated by a single figure, this is followed by a zero.
If a hazard identification number is prefixed by letter 'X', this indicates that the substance will react dangerously with water.

Iar numarul din partea de jos este acel numar "UN".
Semnificatia numarului si implicit continutul il puteti gasi aici:
http://en.wikipedia.org/wiki/List_of_UN_numbers
In exemplul de mai sus: 1203 inseamna "benzina"