EPA Method 551.1 Internal Standard Back Catalog number: 30103 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 34171 Pentachloroethane Price on request 1664.8-K-IO 1,2-Dichlorooctane, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 21948-46-9 Price on request 674338 Phthalimide, 1000mg Price on request