A-Hexachlorocyclohexane

A-Hexachlorocyclohexane (α-HCH or α-BHC) is one of the isomers of hexachlorocyclohexane (HCH). It is a synthetic organochloride that has been used as an insecticide and acaricide.

Chemical Structure

α-HCH is a cyclic hydrocarbon with a molecular formula of C6H6Cl6. It consists of a six-membered ring, with each carbon atom bonded to one hydrogen atom and one chlorine atom. The chlorine atoms are arranged in a chair conformation, which is the most stable conformation for cyclohexane derivatives.

Production and Uses

α-HCH is produced as a byproduct in the synthesis of lindane, another isomer of HCH. It was widely used as an insecticide and acaricide until the late 20th century, when concerns about its environmental persistence and toxicity led to its being phased out in many countries.

Health Effects

Exposure to α-HCH can have serious health effects. It is classified as a possible human carcinogen by the International Agency for Research on Cancer (IARC). It can also cause damage to the liver, kidney, and central nervous system.

Environmental Impact

α-HCH is highly persistent in the environment and can bioaccumulate in the food chain. It is also a potent greenhouse gas, with a global warming potential many times that of carbon dioxide.

See Also

• Hexachlorocyclohexane
• Lindane
• Organochloride
• Insecticide
• Acaricide