EPA Method 507 Pesticide Standard Back Catalog number: 91974 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 2043.8-10MG Perfluorooctane sulfonamide Price on request 678951 Fenchlorazol-ethyl, 100 µg/ml, Acetonitrile, 1ml Price on request PFS-MXA Native PFSA Solution/Mixture, 2µg/ml in MeOH, 1,2ml Price on request