IMO Classes for Dangerous Goods
![Class 4.2](/images/references/imo/4.2-I.gif)
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.