Ammonia as (NH4+) Back Catalog number: 50629 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 8408.14-100MG Perfluoro-n-tetradecane, neat, Solvent-neat, Unit 100mg, # of units-1, Cas.no. 307-62-0 Price on request 679150 13C, 15N2-Semicarbazide hydrochloride, 10mg Price on request 8770.18-50-T Dechlorane plus, 50µg/mL, Solvent-toluene, Unit 1mL, # of units-1, Cas.no. 13560-89-9 Price on request