EPA Method 524 & 624 - Internal Standard Back Catalog number: 19794 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 10032.6-10MG Isonicotinaldehyde, neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. 872-5-5 Price on request 681304 2-Imidazolidone, 100 µg/ml, Acetonitrile, 5ml Price on request 70183 Fluoranthene Price on request