CAS 7012-37-5 appears in our catalog under these names: 2,4,4'-Trichlorobiphenyl, >95% (HPLC), PCB No. 28, PCB No. 28 10 µg/mL in Isooctane, PCB No. 28 100 µg/mL in Hexane, PCB No. 28 100 µg/mL in Isooctane. Offered by: TRC, Dr. Ehrenstorfer, Biosynth, Sigma-Aldrich, Roth. Available pack sizes: 500mg, 50mg, 10mg, 10ml, 2ml, 25mg, 100mg, 250mg.