EPA Method 507 Pesticide Standard Back Catalog number: 91974 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 10371.8-10MG Valproic acid-d6 Price on request 15900-4810-100AN5 Thiophanate-methyl, 100ug/ml in Acetonitrile, 5ml Price on request N-10850-25MG 4-methylphenanthrene, 25mg Price on request