EPA Method 504 Back Catalog number: 81806 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 675303 Hexazinone, 100 µg/ml, Acetonitrile, 5ml Price on request S-4037-K-IOX5 2-Bromothiophene in isooctane, Blank Units: 5x1mL ampoules Price on request 1771.13-K-IO 9-Aminoacridine hemihydrate, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 90-45-9 Price on request