Polychlorinated biphenyls (PCBs) are organochlorine compounds with the formula C 12 H 10−x Cl x; they were once widely used in the manufacture of carbonless copy paper, as heat transfer fluids, and as dielectric and coolant fluids for electrical equipment. [2]

2024年10月17日 · PCBs have no known taste or smell, and range in consistency from an oil to a waxy solid. PCBs belong to a broad family of man-made organic chemicals known as chlorinated hydrocarbons. PCBs were domestically manufactured from 1929 until manufacturing was banned in …

PCBs are manufactured chemicals that were produced for nearly 50 years in the United States before they were banned in 1977. PCBs were banned because of their potential carcinogenicity. Describing key characteristics in Polychlorinated Biphenyls (PCBs) exposure.

Polychlorinated biphenyls are mixtures of up to 209 individual chlorinated compounds (known as congeners). There are no known natural sources of PCBs. PCBs are either oily liquids or solids that are colorless to light yellow. Some PCBs can exist …

This public health statement tells you about polychlorinated biphenyls (PCBs) and the effects of exposure. The Environmental Protection Agency (EPA) identifies the most serious hazardous waste sites in the nation.

What are polychlorinated biphenyls? Polychlorinated biphenyls are mixtures of up to 209 individual chlorinated compounds (known as congeners). There are no known natural sources of PCBs. PCBs are either oily liquids or solids that are colorless to light yellow. Some PCBs can exist as a vapor in air. PCBs have no known smell or taste.

2025年1月18日 · Polychlorinated biphenyl (PCB), any of a class of organohalogen compounds prepared by the reaction of chlorine with biphenyl. A typical mixture of PCBs may contain over 100 compounds and is a colourless, viscous liquid.

Polychlorinated biphenyls (PCBs) are manufactured organic chemicals that are no longer produced in the United States, but are still in the environment and can cause health problems. PCBs do not easily break down and may remain in the air, water and soil for long periods of time.

Polychlorinated biphenyls are mixtures of up to 209 individual chlorinated compounds (known as congeners). There are no known natural sources of PCBs. PCBs are either oily liquids or solids that are colorless to light yellow.

POLYCHLORINATED BIPHENYLS (PCBs) What are they? PCBs are human-made chemicals of varying toxicity. Because they are good insulators and are nonflammable, PCBs have been widely used as coolants and lubricants in transformers and other electrical equipment. Evidence that PCBs damage the environment and may cause health hazards led to the end of PCB