CAS 70362-50-4 appears in our catalog under these names: 3,4,4',5-Tetrachlorobiphenyl, >95% (HPLC), PCB No. 81, PCB No. 81 10 µg/mL in Isooctane, 3,4,4',5–Tetrachlorobiphenyl, 3,4,4',5-Tetrachlorobiphenyl. Offered by: TRC, Dr. Ehrenstorfer, GLPBio, Biosynth, Roth. Available pack sizes: 50mg, 5mg, 10mg, 10ml, 1ml, 25mg, 100mg, 1x5ml.