Poison Fentanyl (English: toxaphene) is a compound of environmental hormones and a persistent organic pollutant. The United Nations Environment Agency (UNEP) has identified 12 substances that may affect ecosystems or the human body, and poison Finn is classified as one of them, with a carcinogenicity classification of 2 B. In the United States in 1982, it was the most widely used insecticide and was banned in 1990. It is a waxy solid of yellow color, and it is a chlorine-containing camphor, an organic chlorine pesticide. The odor of turpentine, which is a mixture of 177 derivatives, is likely to be dissolved in the air by evaporation, so it is more probable to occur in air or soil and is very slow to decompose in the environment. It is only soluble in carbon tetrachloride, benzene and other aromatic organic solvents, if the strong oxidant contact, will quickly react to cause fire and explosion, dissolved in xylene and heating, will decompose the release of corrosive substances, although the poison fen flammable, but not easy to ignite. The decomposition of the poison in the fire may be stimulated, corrosive, such as hydrogen chloride, carbon monoxide and other toxic gases, but poison Finn is not easy to evaporate, temperature is higher than 155 degrees will gradually decompose. If the dosage is too high, it may be fatal in some cases, and if ingested or prolonged inhalation can cause significant damage to the lungs, nervous system, liver, and kidneys.