Toxaphene
An article about the pesticide Toxaphene
Overview[edit | edit source]
Toxaphene is a complex mixture of chlorinated bornanes and camphenes, primarily used as an insecticide. It was widely used in agriculture to control pests on cotton, cereal grains, fruits, nuts, and vegetables. Toxaphene is known for its persistence in the environment and its potential to bioaccumulate in the food chain.
Chemical Properties[edit | edit source]
Toxaphene is a yellow, waxy solid with a piney odor. It is insoluble in water but soluble in organic solvents. The chemical formula of toxaphene is approximately C10H10Cl8, although the exact composition can vary due to its complex mixture of over 670 different compounds.
History and Usage[edit | edit source]
Toxaphene was first introduced in the 1940s and became one of the most heavily used pesticides in the United States by the 1970s. It was primarily used to control insect pests on cotton and other crops. However, due to its environmental persistence and potential health risks, its use has been banned or restricted in many countries since the 1980s.
Environmental Impact[edit | edit source]
Toxaphene is highly persistent in the environment, with a half-life in soil ranging from months to years. It can volatilize into the atmosphere and be transported long distances, leading to widespread environmental contamination. Toxaphene is known to bioaccumulate in the tissues of aquatic organisms, posing risks to wildlife and humans who consume contaminated fish.
Health Effects[edit | edit source]
Exposure to toxaphene can occur through inhalation, ingestion, or dermal contact. It is considered a potential human carcinogen and has been associated with liver and kidney damage, as well as effects on the central nervous system. Chronic exposure can lead to a range of health issues, including immune system suppression and reproductive effects.
Regulation and Ban[edit | edit source]
Due to its persistence and toxicity, toxaphene has been banned or severely restricted in many countries. It is listed under the Stockholm Convention on Persistent Organic Pollutants, which aims to eliminate or restrict the production and use of persistent organic pollutants.
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Contributors: Prab R. Tumpati, MD
