Mixed Calibration Standard 2 Back Catalog number: 52336 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 679880 Benzidine, 100 µg/ml, Acetonitrile, 1ml Price on request 680655 Dothiepin hydrochloride, 25mg Price on request 683673 Atropine, 100 µg/ml, Acetonitrile, 1ml Price on request