PCB No. 31, certified, 25mg Back Catalog number: C20003100 Availability: In the manufacturer's stock Price on request - + Recommended 2870.12-50-IO 3'-Fluoro-2,3,4,4',5-pentachlorobiphenyl, 50µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. Price on request 0712.11-10MG 1-Methylnaphthalene, neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. 90-12-0 Price on request 679552 alpha-Zearalanol, 5mg Price on request