폴리브롬화비페닐

Hexabromobiphenyl is the predominant isomer. These materials are heavy, highly brominated compounds. PBBs are produced by direct bromination of biphenyl and it could be anticipated that very complex mixtures of compounds differing from each both in number of bromine atoms per molecule and by positional isomerism are formed. The possibility also exists (analogous to the PCBs) that halogenated dibenzofurans, for example, brominated dibenzofurans, may be trace contaminants in certain PBB formulations.

용도Polybrominated biphenyls (PBBs) are compounds that were formerly used as flame retardants in electrical products and in business machines and motor housings. There are 209 possible bromobiphenyl congeners, although only a small number have been synthesized and used. All of the commercial products contained a mixture of several individual PBBs. Commercial production ceased in 1977.