IMO Classes for Dangerous Goods

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 9 Class 9

Miscellaneous

A material which presents a hazard during transportation but which does not meet the definition of any other hazard class. This class includes:

1. Any material which has an anesthetic, noxious or other similar property which could cause extreme annoyance or discomfort to a flight crew member so as to prevent the correct performance of assigned duties; or

2. Any material for an elevated temperature material, a hazardous substance, a hazardous waste, or a marine pollutant.