CAS 74472-52-9 appears in our catalog under these names: PCB No. 204, PCB No. 204 10 µg/mL in Isooctane, PCB No. 204 100 µg/mL in Hexane, PCB 204, Concentration: 100 µg/ml Solvent: Isooctane. Offered by: Dr. Ehrenstorfer, HPC Standards. Available pack sizes: 5mg, 10ml, 2ml, 1x5ml.