Primary Calibration PID (VPH) Back Catalog number: 91784 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 4PM97 2,2',3,4',5'-Pentachloro-4-methoxybiphenyl, 1.2ml x 50ug/ml, nonane Price on request 71317 2,4,4-Trimethyl-1-pentene Price on request 8906.17-100-ME (-)-Scopolamine hydrobromide trihydrate, 100µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 114-49-8 Price on request