Flammable solids are materials that can easily ignite and burn under normal transport conditions. They can include a wide range of substances, including those that are combustible, self-reactive, or heat-sensitive. They can also include desensitized explosives, which are explosives that have been made less sensitive to shock or friction, but can still be dangerous if they are heated or exposed to certain conditions.
Sub-Divisions
 | Division 4.1: Flammable solids |
 | Division 4.2: Substances liable to spontaneous combustion |
 | Division 4.3: Substances which, in contact with water, emit flammable gases |
Reason for Regulation
The hazards associated with flammable solids include the risk of fire and explosion, as well as the potential for serious injury or death to workers who handle or come into contact with these materials.
Commonly Transported Flammable Solids; Spontaneous Combustibles; ‘Dangerous When Wet’ Materials
- Alkali metals
- Metal powders
- Aluminium phosphide
- Sodium batteries
- Sodium cells
- Firelighters
- Matches
- Calcium carbide
- Camphor
- Carbon
- Activated carbon
- Celluloid
- Cerium
- Copra
- Seed cake
- Oily cotton waste
- Desensitized explosives
- Oily fabrics
- Oily fibres
- Ferrocerium
- Iron oxide (spent)
- Iron sponge/direct-reduced iron (spent)
- Metaldehyde
- Naphthalene
- Nitrocellulose
- Phosphorus
- Sulphur