CAS 74472-35-8 appears in our catalog under these names: 2,3,3',4,6-Pentachlorobiphenyl, PCB 109, ROTI®Star, 5 mg, glass, PCB 109, Concentration: 100 µg/ml Solvent: Isooctane. Offered by: Biosynth, Roth, HPC Standards. Available pack sizes: 25ml, 50ml, 5mg, 1x5ml.