EPA Method 502/524 Surrogate Standard #2 Back Catalog number: 19267 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 94476 Piperonyl butoxide Price on request 50689 Multi Elements Solution Price on request 2530.11-100-ME 2-Methoxynaphthalene, 100µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 93-04-9 Price on request