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Hexachlorobenzene () is a highly toxic, persistent chlorinated hydrocarbon, formerly used widely as a agricultural fungicide (especially for wheat bunt) until banned in many regions by the 1980s. It exists as a white crystalline solid that bioaccumulates in fatty tissues, causing serious health issues like porphyria, and is classified as a probable human carcinogen. Key Aspects of Hexachlorobenzene:
Uses (Historical): Primarily a fungicide for seed treatment (wheat), and historically in industrial processes like rubber, dye, and aluminum production. Environmental Impact: Highly persistent in the environment and bioaccumulative in the food chain. It is a global pollutant found in air, water, and soil, often as a by-product of industrial processes (like chlorinated solvent production). Health Effects: Exposure, particularly through contaminated food, can lead to porphyria cutanea tarda (skin lesions/disorders), damage to the liver and thyroid, and it is a known animal carcinogen. Physical Properties: White crystalline solid, dense (sinks in water), low solubility in water, and high solubility in fats (lipophilic). Chemical Formula:
.
It is not currently manufactured for commercial use in the U.S. and its use is strictly controlled under international agreements, such as the Stockholm Convention on Persistent Organic Pollutants, due to its toxicity.
Uses (Historical): Primarily a fungicide for seed treatment (wheat), and historically in industrial processes like rubber, dye, and aluminum production. Environmental Impact: Highly persistent in the environment and bioaccumulative in the food chain. It is a global pollutant found in air, water, and soil, often as a by-product of industrial processes (like chlorinated solvent production). Health Effects: Exposure, particularly through contaminated food, can lead to porphyria cutanea tarda (skin lesions/disorders), damage to the liver and thyroid, and it is a known animal carcinogen. Physical Properties: White crystalline solid, dense (sinks in water), low solubility in water, and high solubility in fats (lipophilic). Chemical Formula:
.
It is not currently manufactured for commercial use in the U.S. and its use is strictly controlled under international agreements, such as the Stockholm Convention on Persistent Organic Pollutants, due to its toxicity.