EPA Method 624 Internal / Surrogate Standard Back Catalog number: 92559 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 0043.18-100-T 7-Nitrobenz[a]anthracene, 100µg/mL, Solvent-toluene, Unit 1mL, # of units-1, Cas.no. 20268-51-3 Price on request 72344 1-(2,3-Dichlorophenyl)urea Price on request 2852.11-50-ME 1H,1H-Perfluoroundecan-1-ol , 50µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 307-46-0 Price on request