Is hexachlorobenzene a carcinogen?
However, based on animal studies that have reported cancer of the liver, thyroid, and kidney from oral exposure to hexachlorobenzene, EPA has classified hexachlorobenzene as a probable human carcinogen (Group B2). Very little inhalation data are available.
What does hexachlorobenzene do to humans?
Brief exposure to very high levels of hexachlorobenzene may cause adverse effects on the nervous system such as weakness, tremors, and convulsions; skin sores; and liver and thyroid effects. Long-term exposure can cause damage to the liver and reproductive system and can cause developmental effects.
What is hexachlorobenzene made of?
Hexachlorobenzene was widely used as a pesticide to protect the seeds of onions and sorghum, wheat, and other grains against fungus until 1965. It was also used to make fireworks, ammunition, and synthetic rubber….1.3Crystal Structures.
How is hexachlorobenzene made?
It does not occur naturally in the environment. It is formed as a by-product while making other chemicals, in the waste streams of chloralkali and wood-preserving plants, and when burning municipal waste. Hexachlorobenzene appears as a white crystalline substance. Insoluble in water and denser than water.
Why is hexachlorobenzene banned?
The U.S. EPA says that hexachlorobenzene is a probable human carcinogen. The International Agency for Research on Cancer (IARC) says that hexachlorobenzene is possibly carcinogenic to humans.
Is hexachlorobenzene still used?
Hexachlorobenzene (HCB) was used from the 1930’s to the 1970’s in the U.S. primarily as a fungicide and seed treatment until the U.S. EPA cancelled its use in 1984.
Is methoxychlor still used?
(3) All pesticide uses of methoxychlor were suspended in 2000, and all products are expected to be voluntarily canceled by the end of 2004.
Why is methoxychlor biodegradable than DDT?
Methoxychlor is an insecticide that was intended to take DDT’s place because it is not as soluble in fatty tissues and is more readily biodegradable.