EPA Method 418.1 - TPH IR Standard Back Catalog number: 98245 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 676647 1-Propanethiol, 250mg Price on request 673960 Cyclanilide, 10.0 µg/ml, Acetonitrile, 10ml Price on request 674781 Bifenox free acid, 25mg Price on request