EPA Method 8240A Calibration Check Compounds Back Catalog number: 82412 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 679495 13C6-Sulfamethoxazole, 10mg Price on request 683844 Iprobenfos, 100 µg/ml, Acetonitrile, 5ml Price on request 8352.14 Glyoxal di-2,4-dinitrophenylhydrazone, Please inquire, Solvent-, Unit , # of units-, Cas.no. Price on request