Quick answer
IMO Class 4 (Flammable Solids) covers: This class is divided into subcategories based on the properties of the solids. Typical examples include coal, ferrous metal shavings, wet cotton, sodium, potassium, calcium carbide. Shipments in this class must be declared with their UN number and packing group, and carriers must be certified for dangerous goods transport.
Subclasses
- 4.1Flammable solids, self-reactive, and desensitized explosives. These solids are liable to spontaneous combustion.
- 4.2These are spontaneously flammable substances. This means that they could suddenly ignite when they come in contact with the air or during transport. Examples include coal, ferrous metal shavings, wet cotton, etc.
- 4.3Substances that emit flammable gases when they come in contact with water. Some of the most common materials in this subclass include sodium, potassium, and calcium carbide.
Typical cargo
Coal, ferrous metal shavings, wet cotton, sodium, potassium, calcium carbide
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