from http://www.nsc.org/library/chemical/polychlo.htmTheir melting points and flammability limits are unknown.
Polychlorinated biphenyls (PCBs) are a group of synthetic organic compounds that were commonly used in industrial and commercial applications, such as in electrical equipment, hydraulic fluids, and plasticizers. They are highly toxic and have been banned in many countries due to their harmful effects on human health and the environment.
PCBs are persistent, bioaccumulative, and toxic (PBT) compounds. They are resistant to breaking down in the environment and can accumulate in the food chain, leading to long-term exposure and potential health risks. They are also highly toxic to humans, causing a range of health effects, including cancer, reproductive disorders, and immune system dysfunction.
PCBs are harmful to human health through a variety of routes, including ingestion, inhalation, and dermal contact. They have been linked to various health effects, including cancer, neurological disorders, immune system dysfunction, and developmental disorders. PCBs are also known to disrupt hormonal systems and can affect reproductive and developmental health.
The best way to avoid PCB exposure is to limit or eliminate contact with products and materials that contain PCBs. This includes properly disposing of any old electrical equipment or products containing PCBs and avoiding contaminated areas or sources of PCBs. It is also important to follow safety regulations and guidelines when handling PCBs in industrial settings.
The use and production of PCBs have been banned in many countries, including the United States, under the Stockholm Convention on Persistent Organic Pollutants. However, PCBs are still present in the environment and can be found in old electrical equipment and other products. Proper disposal and handling of PCBs are regulated by government agencies to minimize exposure and potential harm to human health and the environment.