EPA Method 500 Series Internal Standard #5 Back Catalog number: 30004 Manufacturer: ABSOLUTE STANDARDS Availability: 3 weeks Price on request - + Recommended 673428 Pymetrozine, 10.0 µg/ml, Acetonitrile, 10ml Price on request 11291.6-100-NN alpha-BHC-13C6,100 µg/mL,n-nonane,1mL, Price on request 675058 Metazachlor-2-hydroxy, 10mg Price on request