EPA Method 521 Nitrosamines Back Catalog number: 95327 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 6164-3-2T:250MG Perfluorohexanesulfonic acid; PFHxS, 95%, 250mg Price on request 2727.6-K-MEX5 Hexachlorobenzene-13C6 Price on request 72056 n-Dodecane-d26 Price on request