Ammonia as (NH4+) Back Catalog number: 50632 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 19246 Vinyl chloride, 5000µg/ml in MeOH,1ml Price on request 50147 ICP Mix #1 Price on request DF-LCS-A200 Mass-Labelled PCDD/PCDF Solution/Mixture , 1.2ml , nonane Price on request