EPA Method 8240A Calibration Check Compounds Back Catalog number: 82412 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended C12170400 Dexamethasone, certified, 0.1g Price on request 674160 DEET, 250mg Price on request 3510.12-100 Tetradifon, 100µg/mL, Solvent-c.hexane or ac.nitrile, Unit 1mL, # of units-1, Cas.no. 116-29-0 Price on request