Dangerous goods codes consist of a number of digits ranging from 1 to 3, indicating the main, secondary and possibly tertiary hazard type of the material.
The code is then supplemented by a further four digits indicating the specific type of material, defined as the UN number, to which the good is uniquely transported worldwide.
The labels graphically represent the hazard of the material and more than one hazard label can be associated with the same good.
The table of primary hazards for goods
Below is the table of primary hazards:
| Number | Material | Hazard |
|---|---|---|
| 0 | Without specification | Without specification |
| 1 | Explosive materials and articles | Explosion |
| 2 | Gas | Gas emission |
| 3 | Flammable liquids | Flammable |
| 4 | Flammable solids | Flammable |
| 5 | Oxidising substances | Oxidising properties |
| 6 | Toxic substances | Toxicity |
| 7 | Radioactive material | Radioactivity |
| 8 | Corrosive substances | Corrosiveness |
| 9 | Danger of spontaneous violent reaction | Danger of violent reaction resulting from spontaneous decomposition or polymerisation |
