Chloroform, scientifically known as trichloromethane, pronounced as colophony, is an organic compound, a colorless, sweet-smelling, volatile liquid. It is used as an anesthetic in medical treatment. Chloroform is moderately toxic and can enter the body through the digestive tract, respiratory tract and skin. Its main acute toxic effects are anesthesia to the central nervous system, irritation to the eyes and skin, and damage to the heart, liver and kidneys. The acute poisoning of chloroform is manifested by headache, dizziness, weakness, nausea and vomiting. Patients are first excited and then anesthetized, and liver and kidney damage occurs, and severe cases may die due to respiratory paralysis and ventricular fibrillation. If the skin is exposed to chloroform, erythema, edema, blister, frostbite, etc. may appear. Long-term exposure can cause liver damage, indigestion, depression, insomnia, ataxia, etc. A few people can become chloroformophiles. Alcohol consumption can also increase the hepatotoxicity of chloroform. Animal tests have found that chloroform is highly embryotoxic and mildly teratogenic, and can induce liver cancer in mice, but there is no information on human carcinogenesis.