EPA Method 515.1 Internal Standard Back Catalog number: 30023 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 0978.10-K-IOX5 Naphthalene-d8, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-5, Cas.no. 1146-65-2 Price on request 71349 Propyl 4-hydroxybenzoate Price on request 94999 Herbicide Acid Mix Price on request