Dangerous goods are a general term for inflammable, explosive and highly corrosive goods. The transportation of dangerous goods is of great danger. A little carelessness may cause material losses or casualties. According to different properties, dangerous goods are divided into the following categories.

According to the two national standards gb13690-2009 classification and marking of commonly used hazardous chemicals and gb6944-2005 classification and product name and number of dangerous goods, chemicals are divided into eight categories according to their risk: ① explosives ② compressed gas and liquefied gas ③ flammable liquid ④ flammable solid, self combustible and flammable in wet conditions ⑤ oxidants and organic peroxides ⑥ toxic and infectious substances ⑦ radioactive substances ⑧ corrosive substances.