Ammonium (NH4+) Back Catalog number: 54256 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 9424.8-100MG Valproic acid, neat, Solvent-neat, Unit 100mg, # of units-1, Cas.no. 99-66-1 Price on request 10135.45-K-IO 4-n-Nonylphenol pentadecaethoxylate Price on request 678377 2,4'-DDD, 100 µg/ml, Acetonitrile, 5ml Price on request