ABSTRACT
PCB-1260 will not hydrolyze to any reasonable extent (Kollig, 1993). Mackay and Wolkoff (1973) estimated an evaporation half-life of 28.8 min from a surface water body that is 25 °C and 1 m deep. Toxicity: LC50 (96-h) bluegill sunfish >400 µg/L, channel catfish >400 µg/L, cutthroat trout 60,900 µg/L, rainbow trout >232 µg/L (Johnson and Finley, 1980). Suspected human carcinogen. Acute oral LD50 for rats 1,315 mg/kg (quoted, RTECS, 1985). Drinking water standard (final): For all PCBs, the MCLG and MCL are zero and 0.5 µg/L, respectively (U.S. EPA, 2000). Uses: Secondary plasticizer for polyvinyl chloride; in polyester resins to increase strength of fiberglass; varnish formulations to improve water and alkali resistance; as an insulator fluid for electric condensers and as an additive in very high pressure lubricants. In fluorescent and highintensity discharge ballasts manufactured prior to 1979 (U.S. EPA, 1998). Also used in wire or cable coatings; impregnants in cotton and asbestos braided insulation; coating on glass air filter pads, metal mesh to filter air and gas streams (Monsanto, 1960). At a concentration of 5 to 25 wt %, increased the effective kill-life of the lindane spray up to 10 times. May have been used in chlordane and BHC insecticide formulations and in melt coatings for paper and cloth. In various nitrocellulose lacquers to impart weather resistance, luster, adhesion, and decreased burning rate. These lacquers may also contain dibutyl phthalate and/or tricresyl phosphate. A typical paper lacquer may contain acetone, isobutyl acetate, ethanol, toluene and up to 20 wt % PCB-1260 (Monsanto, 1960).
