Polyhalogenated biphenyls, liquid

P.c.b.s PCBs PCB s Polychlorinated biphenyls, 9 Polychlorinated biphenyls, liquid, 9 Polychlorinated biphenyls, solid, 9 Polyhalogenated biphenyls, liquid, 9 Polyhalogenated biphenyls, solid, 9 Polyhalogenated terphenyls, liquid, 9 Polyhalogenated terphenyls, solid, 9... 

Polychlorinated Biphenyls PCB s Polyhalogenated Biphenyls, Liquid or Polyhalogenated Terphenyls, Liquid Polyhalogenated Biphenyls, Solid or Polyhalogenated Terphenyls, Solid This entry also covers appliances such as transformers and condensers containing polyhalo-... 

In 1979, it was stated that poiybrominated aromatic ethers have received little attention (ref. 1). That statement is still applicable. Analyses to characterize this class of commercial flame retardants have been performed using UV (refs. 1-2), GC (refs. 1-6), and GC-MS (refs. 1-4). The bromine content of observed peaks was measured by GC-MS, but no identification could be made. The composition of poiybrominated (PB) diphenyl ether (DPE) was predicted from the expected relationship with polyhalogenated biphenyl, a class which has received extensive attention. NMR (refs. 3-6) was successfully used to identify relatively pure material which had six, or fewer, bromine atoms per molecule. A high performance liquid chromatography (HPLC) method described (ref. 1) was not as successful as GC. A reversed phase (RP) HPLC method was mentioned, but no further work was published. 

Poisonous Liquids, oxidizing, n.o.s. (Inhalation Hazard Zone A) 3122 44 Polyhalogenaled Biphenyls, solid 3152 31... 

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