New tools, based on molecular structure and multivariate explorative methods, have been developed for the ranking, identification and prioritization of PBTs. A new PBT index has been proposed. The PBT Index has been applied and compared with the US-EPA PBT profiler for screening in consensus various classes of chemicals (POPs, Flame Retardants, Personal Care Products and Pharmaceuticals) to prioritize the most potentially PBTs.
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