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2,2'',3'',4,4'',5,5''-Heptachloro-3-biphenylol is a standard for environmental testing and research. Studies on polychlorinated biphenyls and their hydroxylated metabolites in placenta from Madrid mothers.

ChEBI: 2,2',3',4,4',5,5'-Heptachloro-3-biphenylol is a member of biphenyls, a trichlorobenzene and a tetrachlorobenzene.