EPA Method 507 Pesticide Standard Back Catalog number: 91974 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 3489.11-100-AN Profenofos Price on request 0235.16-10MG Pyrene, neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. 129-00-0 Price on request 2138.18-K-IO Triphenylphosphate, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 115-86-6 Price on request