EPA Method 551.1 Internal Standard Back Catalog number: 30103 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 679110 Deltamethrin, 10.0 µg/ml, Cyclohexane, 10ml Price on request 684531 D3-Ketoprofen, 100 µg/ml, Acetonitrile, 1ml Price on request 30621 4-Nitroanisole Price on request