Benzidine, 100 µg/ml, Acetonitrile, 1ml Back Catalog number: 679880 Manufacturer: HPC STANDARDS GmbH Availability: In the manufacturer's stock Price on request - + Recommended 680442 alpha-HCH, 100 µg/ml, Methanol, 1ml Price on request 53081 Instrument Standard 5 Price on request 676669 Ethanol, 5ml Price on request