EPA Method 539Mix #2 Back Catalog number: 96885 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 2540.7-25MG Paraxanthine, neat, Solvent-neat, Unit 25mg, # of units-1, Cas.no. 611-59-6 Price on request 59547 ICP-MS Mix Price on request 93977 PAH Standard, 100µg/ml in Acetonitrile, 1ml Price on request