EPA 8240B Calibration Standard Back Catalog number: 98430 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 2499.13-50-IO 3-Methyldibenzothiophene, 50µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 16587-52-3 Price on request 79204 4,4’-Dichlorobenzophenone Price on request 15900-0932-100AN1 Chlorothalonil R417888 sodium, 100μg/ml in Acetonitrile, 1ml Price on request