Ammonia as N Back Catalog number: 50152 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 0246.36-200-T 2.3,7.8-Di-(peri-naphthylene)-pyrene, 200µg/mL, Solvent-toluene, Unit 1mL, # of units-1, Cas.no. 362052-03-7 Price on request 53133 Multi-Element Solution 1 Price on request 3850.14-K-IO 9,10-Dihydroanthracene, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 613-31-0 Price on request