Ammonia as N Back Catalog number: 54213 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 2195.11-K-ME 1-Methyl-4-nitronaphthalene, 1000µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 880-93-9 Price on request 14032-AN5 PAH - Mix 6, 100µg/ml in Acetonitrile, 5ml Price on request DF-1234689-S 1,2,3,4,6,8,9-Heptachlorodibenzofuran, 1.2ml x 50ug/ml, toluene Price on request