EPA Method 500 Series Internal Standard #5 Back Catalog number: 30004 Manufacturer: ABSOLUTE STANDARDS Availability: 3 weeks Price on request - + Recommended 1313.10-100-AN 1-Fluoronaphthalene, 100µg/mL, Solvent-acetonitrile, Unit 1mL, # of units-1, Cas.no. 321-38-0 Price on request 681728 Terbuthylazine-desethyl-2-hydroxy, 10mg Price on request 8207.12-100MG 7-Phenylheptanoic acid, neat, Solvent-neat, Unit 100mg, # of units-1, Cas.no. 40228-90-8 Price on request