Ammonia as (NH4+) Back Catalog number: 54212 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 2819.5-50-ME n-Perfluoropentanoic acid, 50µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 2706-90-3 Price on request 1707.10-K-AN 4-(N-Methyl-N-nitrosamino)-1-(3-pyridyl)-1-butanone-d4, 1000µg/mL, Solvent-acetonitrile, Unit 1mL, # of units-1, Cas.no. 764661-24-7 Price on request 73297 1,2,5,6,9,10-Hexabromocyclododecane, 1000µg/ml in Toluene, 1ml Price on request