<unk>  (PBTs) are a class of compounds that have high resistance to degradation from abiotic and biotic factors, high mobility in the environment and high toxicity. Because of these factors PBTs have been observed to have a high order of bioaccumulation and biomagnification, very long retention times in various media, and widespread distribution across the globe. Majority of PBTs in the environment are either created through industry or are unintentional byproducts.
Persistent, bioaccumulative and toxic substances
Animal products in pharmaceuticals
Research chemical
Bioactive compound
Hazardous drugs
Toxic heavy metal
International nonproprietary name
Toxicant