Hexachlorocyclopentadiene

Hexachlorocyclopentadiene (HCCPD) is a chemical compound with the formula C5Cl6. This white crystalline substance is a precursor to other chlorinated compounds and a historically important insecticide.

Chemical Structure

Hexachlorocyclopentadiene has a cyclic structure, with a five-membered ring of carbon atoms. Each carbon atom is bonded to one other carbon atom and two chlorine atoms. The molecule is planar, with all atoms in the same plane.

Production

Hexachlorocyclopentadiene is produced by the photochemical reaction of carbon tetrachloride with chlorine in the presence of ultraviolet light. The reaction is highly exothermic, releasing a large amount of heat.

Uses

Hexachlorocyclopentadiene is used primarily as a precursor to other chemicals. It is a starting material for the production of pesticides, flame retardants, and plasticizers. It is also used in the synthesis of dyes and pharmaceuticals.

Health Effects

Exposure to hexachlorocyclopentadiene can cause a variety of health effects. Inhalation can lead to respiratory distress, while skin contact can cause dermatitis. Long-term exposure can lead to liver damage and cancer.

Environmental Impact

Hexachlorocyclopentadiene is highly persistent in the environment and can bioaccumulate in wildlife. It is toxic to aquatic life and can cause long-term adverse effects in the aquatic environment.

See Also

• Chlorinated compounds
• Pesticides
• Flame retardants
• Plasticizers

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