Classification of dangerous goods

Based on their different hazardous properties, dangerous goods are divided into nine classes, and some classes are further subdivided into divisions. 

Class 1 Explosives 

Division 1.1 Articles and substances that have a mass explosion hazard; 
Division 1.2 Articles and substances that have a projection hazard but not a mass explosion hazard; 
Division 1.3 Articles and substances that have a fire hazard, and either a minor blast hazard or a minor projection hazard, or both, but not a mass explosion hazard; 
Division 1.4 Articles and substances that present no significant hazard; 
Division 1.5 Very insensitive substances that have a mass explosion hazard; 
Division 1.6 Extremely insensitive articles that have no mass explosion hazard. 

Class 2 Gases 

Division 2.1 Flammable gases 
Division 2.2 Non-flammable, non-toxic gases; 
Division 2.3 Toxic gases

Class 3 Flammable Liquids

Class 4 Flammable Solids, Substances Liable to Spontaneous Combustion, and Substances that, in Contact with Water, Emit Flammable Gases 

Division 4.1 Flammable solids; 
Division 4.2 Substances liable to spontaneous combustion; 
Division 4.3 Substances that, in contact with water, emit flammable gases.

Class 5 Oxidizing Substances and Organic Peroxides 

Division 5.1 Oxidizing substances; 
Division 5.2 Organic peroxides. 

Class 6 Toxic and Infectious Substances 

Division 6.1 Toxic substances; 
Division 6.2 Infectious substances. 

Class 7 Radioactive Material 

Class 8 Corrosives 

Class 9 Miscellaneous Dangerous Goods