Ammonium as N Back Catalog number: 50791 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 3396.8-100-AN Ethoprop, 100µg/mL, Solvent-acetonitrile, Unit 1mL, # of units-1, Cas.no. 13194-48-4 Price on request 8483.19-100-ME Metoprolol tartrate, 100µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 56392-17-7 Price on request 680581 Hexachlorocyclopentadiene, 100 µg/ml, Cyclohexane Price on request