EPA Method 548.1 Internal Standard Back Catalog number: 30078 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 72348 Tris(2-ethylhexyl)phosphate Price on request 70528 Allethrin Price on request 673397 Nitenpyram, 100 µg/ml, Acetonitrile, 5ml Price on request