Dangerous goods are classified into 9 categories according to their hazard or main hazard:

Category 1 explosives

Category 2 gas

Class 3 flammable liquid

Category 4 Flammable solids, substances prone to spontaneous combustion, substances that emit flammable gases when meeting water

Class 5 Oxidizing substances and organic peroxides

Category 6 Toxic substances and infectious substances

Class 7 radioactive substances

Category 8 Corrosive substances

Category 9 Miscellaneous hazardous substances and articles

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