EPA Method 551.1 Internal Standard Back Catalog number: 32103 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 15900-1050-100AN5 Cyfluthrin, 100µg/ml in Acetonitrile, 5ml Price on request 675239 Mefenpyr-diethyl, 100 µg/ml, Acetonitrile, 5ml Price on request 32451 1,1,1-Trichloroethane Price on request