CAS 65510-44-3 appears in our catalog under these names: PCB No. 123, PCB No. 123 10 µg/mL in Isooctane, 2',3,4,4',5–Pentachlorobiphenyl, 2',3,4,4',5-Pentachlorobiphenyl, PCB 123, ROTI®Star, 5 mg, glass. Offered by: Dr. Ehrenstorfer, GLPBio, Biosynth, Roth, HPC Standards. Available pack sizes: 5mg, 10ml, 1ml, 25ml, 50ml, 1x5ml.