2,4-DB Back Catalog number: 83563 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended C20510000 Acenaphthylene, certified, 0.1g Price on request 3344.9-100-AN Chlorpyrifos, 100µg/mL, Solvent-acetonitrile, Unit 1mL, # of units-1, Cas.no. 2921-88-2 Price on request PFNA Perfluoro-n-nonanoic acid, 50µg/ml in MeOH, 1,2ml Price on request