Ammonia as (NH4+) Back Catalog number: 54212 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 8213.12-K-AN n-Valeraldehyde-PFBOA derivative, 1000µg/mL, Solvent-acetonitrile, Unit 1mL, # of units-1, Cas.no. Price on request 2152.24-100-T 2,9-Dimethylpicene, 100µg/mL, Solvent-toluene, Unit 1mL, # of units-1, Cas.no. 1679-02-3 Price on request 2903.20-1MG 17beta-Ethynylestradiol,neat,neat,1mg, Price on request