EPA Method 552 Internal Standard Back Catalog number: 30055 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 50678 Propionic Acid (C3H6O2) Price on request 2218.24-K-IO Di-iso-nonyl adipate, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 33703-08-1 Price on request 53078 Instrument Standard 2 Price on request