EPA Method 624 Surrogate Standard Back Catalog number: 19112 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 679222 Mapenterol hydrochloride, 5mg Price on request 2086.6-K-T 3-Nitrophenol, 1000µg/mL, Solvent-toluene, Unit 1mL, # of units-1, Cas.no. 554-84-7 Price on request X9112 Heptachlor epoxide Price on request