2,3,7,8-TCDD

…has chlorine atoms at the 2,3,7, and 8 positions. This isomer—2,3,7,8-TCDD—is extremely stable chemically. It is virtually insoluble in water and in most organic compounds but is soluble in oils. It is this combination of properties that allows this dioxin in soil to resist dilution with rainwater and causes it…

… (PCBs), polybrominated biphenyls (PBBs), and 2,3,7,8-tetrachlorodibenzodioxin TCDD, can produce a number of toxic effects in laboratory animals, including cancer, birth defects, liver injury, porphyria, and immunotoxicity (Table 2). The PCBs have been extensively used as a cooling agent in electrical transformers. It appears that humans are more resistant to the…

…contained small, variable proportions of 2,3,7,8-tetrachlorodibenzo-p-dioxin—commonly called “dioxin”—which is a by-product of the manufacture of 2,4,5-T and is toxic even in minute quantities. About 50 million litres (13 million gallons) of Agent Orange—containing about 170 kg (375 pounds) of dioxin—were dropped on Vietnam. Agent Orange was one of several herbicides…