Ammonia as N Back Catalog number: 59479 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 677608 1H,1H,2H,2H-Perfluorohexanesulfonic acid, 10mg Price on request 1017.14-K-IO 1,2-Bis(phenylthio)ethane, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 622-20-8 Price on request 66137 2,2',3,4,4',5-Hexachlorobiphenyl (137) Price on request