On October 27, 2017, the list of carcinogens released by the International Agency for Research on Cancer of the World Health Organization was initially compiled for reference, and benzene was included in the list of carcinogens.

　　First aid treatment:

　　1. In case of inhalation poisoning, move the patient to a place with fresh air quickly, take off the contaminated clothes, and loosen all the clothes, neck and chest buttons. If there is dirt on the mouth and nose, it should be removed immediately to ensure normal lung ventilation and smooth breathing. And pay attention to keeping your body warm.

　　2. Oral poisoning should use 0.005 activated carbon suspension or 0.02 sodium bicarbonate solution gastric lavage to induce vomiting, and then take catharsis and diuretic drugs to speed up the excretion of poisons in the body and reduce the absorption of poisons.

　　3. People with skin poisoning should change to the contaminated clothes, shoes and socks, and wash the skin and hair repeatedly with soapy water and clean water.

　　4. For patients with coma or convulsions, foreign bodies in the mouth should be removed as soon as possible to keep the airway unobstructed, and they should be escorted to the hospital for treatment by special personnel.