Ammonia as (NH4+) Back Catalog number: 50633 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 3740.12-100-IO 2,3',4,5-Tetrachlorobiphenyl, 100µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 32598-11-1 Price on request 71868 Benzophenone Price on request 93593 Glycol Mix Price on request