CAS 38444-93-8 appears in our catalog under these names: PCB No. 40, PCB No. 40 10 µg/mL in Isooctane, 2,2',3,3'-Tetrachlorobiphenyl, PCB 40, ROTI®Star, 25 mg, glass, PCB 40, Concentration: 100 µg/ml Solvent: Isooctane. Offered by: Dr. Ehrenstorfer, Biosynth, Roth, HPC Standards. Available pack sizes: 25mg, 10ml, 10mg, 5mg, 50mg, 1x5ml.