PCB No. 4, certified, 25mg Back Catalog number: C20000400 Availability: In the manufacturer's stock Price on request - + Recommended 11712.12-100-IO 2,2',3,4,6-Pentachlorobiphenyl ,100 µg/mL,isooctane,1mL, Price on request 2704.12-100-ME 1-Ethyl-4-(2-methylpropyl)benzene, 100µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 100319-40-2 Price on request M8PFOS Sodium perfluoro-[13C8]octanesulfonate, 1.2ml x 50ug/ml, methanol Price on request