Nitrite (NO2-) as N Back Catalog number: 50624 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 0278.22-10MG Indeno[1,2,3-cd]fluoranthene, neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. 193-43-1 Price on request DF-IS-H40 Mass-Labelled PCDF Internal Standard Solution, 1.2ml, nonane Price on request EPA-1668IS Internal Standard Stock Solution, 1.2ml, nonane Price on request