EPA Method 515.1 Internal Standard Back Catalog number: 30023 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 679942 Procaine hydrochloride, 250mg Price on request 36141 Oxamyl Price on request 1139.19-K-IO n-Nonadecane, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 629-92-5 Price on request