Ammonia as (NH4+) Back Catalog number: 54214 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 680220 3-Hydroxybutyric acid, 50mg Price on request 0237.24-200-T Dibenzo[e,l]pyrene, 200µg/mL, Solvent-toluene, Unit 1mL, # of units-1, Cas.no. 192-51-8 Price on request 9346.11-100-ME Phenazone-d3 (N-methyl-d3), 100µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 65566-62-3 Price on request