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: