EPA Method 507 - Performance Check Solution Back Catalog number: 19137 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 673303 Fluroxypyr, 100 µg/ml, Acetonitrile, 5ml Price on request 3799.8-100MG 2,3,4,5-Tetramethylthiophene, neat, Solvent-neat, Unit 100mg, # of units-1, Cas.no. 14503-51-6 Price on request 9486.16-50-IO 1-Chloropyrene, 50µg/mL, Solvent-Isooctane, Unit 1mL, # of units-1, Cas.no. 34244-14-9 Price on request