VPH Primary Calibration Spike Rev 1.1 Back Catalog number: 51166 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 70192 Heptachlor Price on request 79281 trans-Nonachlor Price on request 678423 beta-HCH, 100 µg/ml, Acetonitrile, 5ml Price on request