Safety Statements: Suspected human carcinogen. Poison by subcutaneous route. Mildly toxic by ingestion. Human systemic effects by inhalation: pulmonary and liver effects. Experimental reproductive effects. Mutation data reported. When heated to decomposition it emits toxic fumes of Cl−. Used in heat transfer, hydraulic fluids, lubricants, and insecticides. See also POLYCHLORINATED BIPHENYLS.Analytical Methods: For occupational chemical analysis use NIOSH: Polychlorobiphenyls, 5503; In Serum, see 8004.