EPA Method 515.1 Internal Standard Back Catalog number: 31023 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 673243 Cyazofamid, 100 µg/ml, Acetonitrile, 5ml Price on request 681444 4-Acetamidoantipyrine, 10.0 µg/ml, Acetonitrile, Price on request 1606.13-10MG 2-Fluorodiphenylmethane, neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. 3794-15-8 Price on request