CAS 52663-68-0 appears in our catalog under these names: PCB No. 187, PCB No. 187 10 µg/mL in Isooctane, 2,2',3,4',5,5',6–Heptachlorobiphenyl, PCB 187, Concentration: 100 µg/ml Solvent: Isooctane. Offered by: Dr. Ehrenstorfer, GLPBio, HPC Standards. Available pack sizes: 10mg, 10ml, 1,2ml, 1ml, 1x5ml.