AIR - ROAD - SEA - SAFETY
The class is subdivided in three different divisions, as they can be ignited under different circumstances.
4.1 - will catch fire trough friction or heat.
4.2 - does not need heat or friction, mere contact with air or sunlight can cause combustion. These are not ordinary substances a normal person will send as a present, unaware of DG regulations. These are offered by specialized companies that are more (hopefully) aware of the regulations.
4.3 - are the dangerous when wet substances, which only burn when in contact with water. Also here we have specific chemicals in mind
4.1 Flammable Solids
4.2 Spontaneously Combustible
4.3 Dangerous When Wet
4.1 - Matches, Magnesium
4.2 - White phosphorus, Ferrocerium (used in fire-steel), flint
4.3 - Lithium, Sodium, Carbid (used in mining)Return To DG Overview