Primary Calibration PID (VPH) Back Catalog number: 91784 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 8226.6-100-CY Desmetryne Price on request 9685.8-K-IO Octamethylcyclotetrasiloxane, 1000µg/mL, Solvent-Isooctane, Unit 1mL, # of units-1, Cas.no. 556-67-2 Price on request 677159 Di-n-octyltin dichloride, 100mg Price on request