EPA Method 502.2 Internal Standard Back Catalog number: 91703 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 681685 2,4,6-Trichlorophenol, 100 µg/ml, Methanol, 5ml Price on request 679729 Cyenopyrafen, 100 µg/ml, Acetonitrile, 1ml Price on request 679459 4,4'-DDE, 100 µg/ml, Methanol, 1ml Price on request