MA - VPH Primary Calibration Spike Back Catalog number: 91757 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 93769 EPA Methd 8330 Standard Price on request 1077.17-K-IO n-Undecylbenzene, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 6742-54-7 Price on request 10819.15-100MG Propoxycarbazone-sodium Price on request