Classes for Dangerous Goods

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Class 4.2: Flammable solids.

IMO Classes

Class 1.
Explosives Class 2.
Gases Class 3.
Flammable Liquids Class 4.1.
Flammable Solids or Substances Class 4.2.
Flammable solids Class 4.3.
Substances which, in contact with water, emit flammable gases Class 5.1.
Oxidizing substances (agents) by yielding oxygen increase the risk and intensity of fire Class 5.2.
Organic peroxides - most will burn rapidly and are sensitive to impact or friction Class 6.1.
Toxic substances Class 6.2.
Infectious substances Class 7.
Radioactive Substances Class 8.
Corrosives Class 9.
Miscellaneous dangerous substances and articles
Class 4.2

Flammable Solids

Spontaneously Combustible material is a pyrophoric material, which is a liquid or solid that can ignite within five (5) minutes after coming in contact with air or a self-heating material that when in contact with air and without an energy supply is liable to self-heat.