Polychlorinated dibenzo-p-dioxins occur as 75 different isomers. There are 14 possible pentachlorodibenzo-p-dioxin isomers.
Registry Numbers and Inventories.
Melting point, °C
Vapor pressure, mmHg
5.6E-10 (25 C)
Solubility in water
0.12 ug/L at 20 C
Partition coefficient, pKow
Hazards and Protection.
Recycle any unused portion of the material for its approved use or return it to the manufacturer or supplier.
Dioxins may be formed during the combustion of PCBs in fires and explosions.
Probable human carcinogen. Aesthenia, headaches, and pain in the extremities, peripheral neuropathy, ulcers, altered liver function, enzyme induction, altered lipid metabolism, and abnormal urinary
Acute manifestation of toxicity that has been shown in humans is chloracne, an acne-like condition that takes months or years to disappear.
Administer activated charcoal if available. Ipecac-induced vomiting may be useful for initial treatment at the scene (eg, children at home) if it can be given within a few minutes of exposure.
Remove victims from exposure and give supplemental oxygen if available.
Immediately remove the material as quickly as possible to prevent additional absorption of the compounds. Remove contaminated clothing and wash.
Irrigate for at least 15 minutes with water.