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Items: 11


2,2',4',6'-tetrachlorobiphenyl-4-ol [Supplementary Concept]

impairs the secretory function of ovarian steroidogenic cells; structure in first source

Date introduced: December 6, 2015


Polychlorinated Biphenyls

Industrial products consisting of a mixture of chlorinated biphenyl congeners and isomers. These compounds are highly lipophilic and tend to accumulate in fat stores of animals. Many of these compounds are considered toxic and potential environmental pollutants.

Year introduced: 1992


Organic Chemicals

A broad class of substances containing carbon and its derivatives. Many of these chemicals will frequently contain hydrogen with or without oxygen, nitrogen, sulfur, phosphorus, and other elements. They exist in either carbon chain or carbon ring form.

Year introduced: 1998


Hydrocarbons, Halogenated

Hydrocarbon compounds with one or more HYDROGEN atoms substituted with HALOGENS.

Year introduced: 1966


Hydrocarbons, Cyclic

Organic compounds composed exclusively of carbon and hydrogen forming a closed ring that may be either alicyclic or aromatic.

Year introduced: 1998


Hydrocarbons, Chlorinated

Hydrocarbon compounds with one or more of the hydrogens replaced by CHLORINE.

Year introduced: 1974


Hydrocarbons, Aromatic

Organic compounds containing carbon and hydrogen in the form of an unsaturated, usually hexagonal ring structure. The compounds can be single ring, or double, triple, or multiple fused rings.

Year introduced: 1998



Organic compounds that primarily contain carbon and hydrogen atoms with the carbon atoms forming a linear or circular structure.


Biphenyl Compounds

Whitish aromatic crystalline organic compounds made up of two conjoined BENZENE rings.


Benzene Derivatives

Organic compounds derived from BENZENE.

Year introduced: 1968


Dioxins and Dioxin-like Compounds

A group of toxic chemical compounds that share chemical structures and biological characteristics that are related to the potent carcinogen 2,3,7,8-tetrachlorodibenzo-p-dioxin.

Year introduced: 2017

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