Brominated dioxins and furans may be of equivalent toxicity to chlorinated dioxins and furans, chemical compounds widely recognized as some of the most toxic chemicals many being toxic even in very low concentrations.

Meanwhile, when PVCs are produced or disposed by incineration, chlorinated dioxins and furans are released. Dioxins and furans are classes of chemical compounds widely recognized as some of the most toxic chemicals ever made by humans and many are toxic even in very low concentrations.