Lindane is an insecticide, also known as gamma-Hexachlorocyclohexane (HCH) and benzene hexachloride (BHC). It has an LD50 of 88 mg/kg, is suspected of being a carcinogen and is banned in many countries and the US state of scabies infection, head lice and other ectoparasites. In the United States, the Food and Drug Administration requires these products be labeled with prominent warnings about possible neurotoxicity, particularly in young patients.
Benzene is the parent substance of the aromatic compounds, a large and important group of organic compounds.
Benzene and the other aromatic hydrocarbons are obtained for industrial purposes from the distillation of coal tar, a byproduct in the manufacture of coke, and from petroleum by special reforming methods.
Benzene was discovered in 1825 by the English scientist Michael Faraday, who isolated it from oil gas and gave it the name bicarburet of hydrogen.
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