EPA Method 8270C Pesticide Mix #20 Back Catalog number: 91003 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 681916 Prallethrin, 100 µg/ml, Acetonitrile, 5ml Price on request 70038 a-BHC Price on request A794615 Atrazine Mercapturate, 5mg Price on request