EPA Method 515.1 Internal Standard Back Catalog number: 31023 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 2322.13-K-IO 9-Fluorenone, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 486-25-9 Price on request 681568 Narasin, 10mg Price on request 3476.21-10MG Permethrin,neat,neat,10mg, Price on request