2. Classification and Transportation Labels
The classification of dangerous goods in China is also based on the TDG. According to the GB 6944-2012, dangerous goods are classified into 9 major groups based on their hazardous properties, as detailed in the table below:
Table 1: Classification of dangerous goods in China
Classification of Dangerous Goods |
Dangerous Goods Shipping Name |
Class 1 |
Explosives |
Class 2 |
Gas |
Class 3 |
Liquid desensitized explosives |
Class 4 |
Flammable solids, Self-heating substances and mixtures, Substances and mixtures which in contact with water |
Class 5 |
Oxidizing substances and organic peroxides |
Class 6 |
Acute toxicity, infectious substances |
Class 7 |
Radioactive substances |
Class 8 |
Skin corrosion |
Class 9 |
Hazardous to the aquatic environment(environmentally hazardous substances) |
Categories 1, 2, 4, 5 and 6 have been further divided into subcategories. Specific definitions and corresponding transport labels are given below:
Class 1 Explosives
Explosive materials, classified as "dangerous goods", include substances that can react chemically to produce gases and cause significant damage through heat, pressure, and speed. This category also encompasses pyrotechnics and items like fireworks and airbags, all subject to strict regulation due to their potential hazards.
Note that there six classes of Class 1
Class 1.1 A substance or article with a mass explosion hazard.
Class 1.2 A substance or article with a fragment projection hazard, but not a mass explosion hazard.
Class 1.3 A substance or article which has a fire hazard along with either a minor blast hazard or a minor projection hazard or both, but not a mass explosion hazard.
Class 1.4 A substance or article which presents no significant hazard.
Class 1.5 A very insensitive substance which nevertheless has a mass explosion hazard.
Class 1.6 An extremely insensitive article which does not have a mass explosion hazard.
Table 2: Transport labels of Class 1
Class |
Transport Labels |
Class 1.1, 1.2 and 1.3 |
|
Class 1.4 |
|
Class 1.5 |
|
Class 1.6 |
|
Class 2 Gases
Gases are substances that meet either of the following criteria: a) substances with a vapour pressure greater than 300 kPa at 50 °C; b) substances that are completely gaseous at a standard pressure of 101.3 kPa at 20 °C, for instance chlorine, helium, aerosol cans, etc.
Note that there are three classes of Class 2 :
Class 2.1 Flammable Gases
Class 2.2 Non-Flammable, Non-Toxic Gases
Class 2.3 Toxic Gases
Table 3: Transport labels of Class 2
Class 3 Flammable Liquids
This category encompasses dangerous goods in the form of liquid desensitized explosives. These are defined as liquids that are inherently flammable or comprise flammable liquid mixtures, as well as those that incorporate solids in solution or suspension. For classification as a flammable liquid, the substance must exhibit a flash-point not exceeding 60°C in a closed-cup test or 65.5°C in an open-cup test. Liquid desensitized explosives are specifically engineered homogeneous liquid blends, formulated by dissolving or dispersing explosive materials in water or other liquid media to mitigate their explosive characteristics. Various agents, including but not limited to paints, acetone, and perfumes, may serve as constituents in the formulation of liquid desensitized explosives within the realm of dangerous goods.
Table 4: Transport labels of Class 3
Class |
Transport Labels |
Class 3 |
or
|
Class 4 Flammable Solids; Substances prone to spontaneous combustion; Substances that emit flammable gases in contact with water
This category includes flammable solids, substances liable to spontaneous combustion and substances which emit flammable gases on contact with water. It includes substances other than those classified as explosives which are flammable under conditions of carriage or which may cause or lead to a fire, such as metal powders, white phosphorus, activated carbon, etc.
Note that there are three classes of Class 3:
Class 4.1 Flammable solids, self-reactive substances and solid desensitized explosives.
Class 4.2 Substances liable to spontaneous combustion
Class 4.3 A substance that, on contact with water, emits dangerous quantities of flammable gases.
Table 5: Transport labels of Class 4
Class |
Transport Labels |
Class 4.1 |
|
Class 4.2 |
|
Class 4.3 |
or
|
Class 5 Oxidizing Substances and Organic Peroxides
This category encompasses substances with the inherent capacity to instigate or accelerate combustion, notably oxidizing substances and organic peroxides. Oxidizing agents, while not combustible in isolation, can significantly enhance the combustion of other materials through oxygen liberation. Organic peroxides, characterized by their bivalent peroxy (-O-O-) linkage, are organic compounds including but not limited to hydrogen peroxide, calcium hypochlorite, and 84 disinfectant.
Note that there are two classes of Class 5:
Class 5.1 Oxidising substances
Class 5.1 Organic peroxides
Table 6: Transport labels of Class 5
Class |
Transport Labels |
Class 5.1 |
|
Class 5.2 |
or
|
Class 6 Toxic Substances and Infectious Substances
This category pertains to materials deemed toxic or infectious. Toxic substances are identified by their potential to inflict harm or cause severe health consequences upon ingestion, inhalation, or dermal absorption, possibly leading to mortality or grave injury. Infectious substances are those known or presumed to harbor pathogens, such as paraquat, medical waste, and biological cultures.
Note that there are two classes of Class 6:
Class 6.1 Toxic Substances
Class 6.2 Infectious Substances
Table 7: Transport labels of Class 6
Class |
Transport Labels |
Class 6.1 |
|
Class 6.2 |
|
Class 7 Radioactive Materials
This category is dedicated to materials containing radiosondes, including medical isotopes, Ammonium diuranate, and radiocobalt, which surpass specified activity concentration and total activity thresholds as per GB 11806.
Table 8: Transport labels of Class 7
Class |
Transport Labels |
7A |
|
7B |
|
7C |
|
7E |
|
Class 8 Corrosives
Corrosives are chemicals that have the potential to cause significant damage to living tissue on contact or to damage/destroy other items if spilled, including hydrochloric acid, caustic soda and batteries.
Table 9: Transport labels of Class 8
Class |
Transport Labels |
Class 8 |
|
Class 9 Miscellaneous Products, Substances or Organisms
This category applies to substances and articles that are considered to be hazardous but do not meet the criteria for any of the other categories. It includes items such as lithium battery packs, medical devices, environmentally hazardous substances, substances emitting flammable gases, etc.
Table 10: Transport labels of Class 9
Class |
Transport Labels |
Class 9 |
|
9A |
|