Polycholorinated biphenyls. VI. 2,3,7,8-tetrachlorodibenzofuran, a critical byproduct in the synthesis of 2,2',4,4',5,5'-hexachlorobiphenyl by the Ullmann reaction.
D001572:Benzofurans / Q000138:chemical synthesis* / Q000302:isolation & purification; D002849:Chromatography, Gas; D011078:Polychlorinated Biphenyls / Q000138:chemical synthesis*
D001572:Benzofurans; D011078:Polychlorinated Biphenyls