PBT/vPvB assessment

摘要

PBT and vPvB substances are defined as substances which are persistent, bioaccumulative and toxic, or very persistent and very bioaccumulative. They are unwanted in the environment as they are supposed to have long-term adverse impacts because of their properties. The term PBT was first introduced in Japan’s Chemical Substances Control Law in 1973, and was later adopted by several laws around the globe, including the US Toxic Substances Control Act of 1976, the Canadian Environmental Protection Act of 1999 and the REACH Regulation. The criteria to identify a substance as a PBT were first based on the identified pattern in environmental behaviour of a small group of compounds known as the “dirty dozen”, which included aldrin, DDT, endrin and hexachlorobenzene.