CAS 52663-70-4 appears in our catalog under these names: 2,2',3,3',4',5,6–Heptachlorobiphenyl, 2,2',3,3',4',5,6-Heptachlorobiphenyl, PCB No. 177 10 µg/mL in Isooctane, PCB 177, ROTI®Star, 5 mg, glass, PCB 177. Offered by: GLPBio, Biosynth, Dr. Ehrenstorfer, Roth, HPC Standards. Available pack sizes: 1ml, 5mg, 10mg, 25mg, 50mg, 10ml, 1x5mg.