Hexachlorobutadiene

Hexachlorobutadiene (HCBD) is a chlorocarbon that is classified as a persistent organic pollutant (POP). It is a colorless liquid that has a mild, sweet odor. It is used in the manufacture of rubber compounds and as a hydraulic, heat transfer or transformer fluid.

Production and Uses

Hexachlorobutadiene is produced as a byproduct in the manufacture of carbon tetrachloride and other chlorinated hydrocarbons. It is also used in the production of rubber compounds, and as a hydraulic, heat transfer or transformer fluid.

Health Effects

Exposure to hexachlorobutadiene can cause a variety of health effects. Acute (short-term) exposure can cause respiratory irritation, gastrointestinal effects, changes in the liver and kidneys, and skin and eye irritation. Chronic (long-term) exposure can cause damage to the liver, kidneys, and lungs, and may also affect the nervous system.

Environmental Impact

Hexachlorobutadiene is a persistent organic pollutant, which means it remains in the environment for a long time. It can be transported long distances in the air and can accumulate in the fatty tissues of animals. It is toxic to aquatic life and can cause long-term adverse effects in the environment.

Regulation

In the United States, the Environmental Protection Agency (EPA) has set a maximum contaminant level (MCL) for hexachlorobutadiene in drinking water at 0.0002 milligrams per liter (mg/L). The Occupational Safety and Health Administration (OSHA) has set a permissible exposure limit (PEL) for hexachlorobutadiene in the workplace at 0.02 parts per million (ppm) over an 8-hour workday.

See Also

• Chlorocarbon
• Persistent organic pollutant
• Environmental Protection Agency
• Occupational Safety and Health Administration