EPA Method 601 Internal Standard Back Catalog number: 19094 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 673518 lambda-Cyhalothrin, 100 µg/ml, Ethyl acetate, 5m Price on request B276580-10MG Benzyl Fentanyl, 10mg Price on request 70193 Heptachlor epoxide (isomer B), 1000µg/ml in MeOH, 1ml Price on request