CAS No 1336-36-3 , 1,2,3-trichloro-5-(3,4,5-trichlorophenyl)benzene

Like the chlorinated naphthalenes, the chlorinated diphenyls have two distinct actions on the body, namely, a skin effect and a toxic action on the liver. This hepato-toxic action of the chlorinated diphenyls appears to be increased if there is exposure to carbon tetrachloride at the same time. The higher the chlorine content of the diphenyl compound, the more toxic it is liable to be. Oxides of chlorinated diphenyls are more toxic than the unoxidized materials. In persons who have suffered systemic intoxication, the usual signs and symptoms are nausea, vomiting, loss of weight, jaundice, edema, and abdominal pain. If the liver damage has been severe the patient may pass into a coma and die.

Combustible when exposed to heat or flame. When heated to decomposition they emit highly toxic fumes of Cl⁻. See also specific compounds.

Analytical Methods:

For occupational chemical analysis use NIOSH: Polychlorobiphenyls, 5503.