PCB No. 21, 100µg/ml in Isooctane, 1ml Back Catalog number: 66021 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 676479 1,2,3,6-Tetrahydrophthalic anhydride, 250mg Price on request CBP-2367 2,3,6,7-Tetrachlorobiphenylene, 1.2ml x 50ug/ml, nonane Price on request 2000.12-25MG 2,2',5,5'-Tetrachlorobiphenyl, neat, Solvent-neat, Unit 25mg, # of units-1, Cas.no. 35693-99-3 Price on request