CAS 38444-84-7 appears in our catalog under these names: PCB No. 20, PCB No. 20 10 µg/mL in Isooctane, 47059, 2,3,3'-Trichlorobiphenyl (IUPAC N, PCB 20, ROTI®Star, 10 mg, glass, PCB 20, Concentration: 100 µg/ml Solvent: Isooctane. Offered by: Dr. Ehrenstorfer, Sigma-Aldrich, Roth, HPC Standards. Available pack sizes: 10mg, 10ml, 25MG, 1x5ml.