EPA Method 551.1 Internal Standard Back Catalog number: 30103 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 674488 Fluquinconazole, 10.0 µg/ml, Acetonitrile, 10ml Price on request 0046.20-100-T 3-Nitroperylene, 100µg/mL, Solvent-toluene, Unit 1mL, # of units-1, Cas.no. 20589-63-3 Price on request 673604 Fluroxypyr-1-methylheptylester, 100 µg/ml, Ethyl Price on request