Dioxin is the name given to a group of persistent, very toxic chemicals. The most toxic form of dioxin is 2,3,7,8-tetrachlorodibenzo-p-dioxin or TCDD.
Dioxin is a potent, cancercausing agent, and causes reproductive harm. It has been called “the most toxic substance known to science” because of its wide array of adverse health effects and its ability to cause harm at very low exposure levels.