Hazardous Goods Classes

There are various classes of hazardous materials, which are categorized as follows:

Class 1: Explosives and items containing explosives (with 6 subclasses)
Class 2.1: Gases (flammable)
Class 2.2: Gases (non-flammable)
Class 2.3: Gases (toxic)
Class 3: Flammable liquids
Class 4.1: Flammable solids, self-reactive substances, and desensitized explosives
Class 4.2: Self-heating substances
Class 4.3: Substances that emit flammable gases when in contact with water
Class 5.1: Oxidizing substances
Class 5.2: Organic peroxides
Class 6.1: Toxic substances
Class 6.2: Infectious substances
Class 7: Radioactive materials
Class 8: Corrosive substances
Class 9: Various dangerous substances and items