Ammonia as (NH4+) Back Catalog number: 50633 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 681587 13C4-Fipronil, 100 µg/ml, Acetonitrile, 1ml Price on request 0383.12-K-IO Dibenzothiophene-d8, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 33262-29-2 Price on request 675256 Atenolol, 100 µg/ml, Acetonitrile, 5ml Price on request