EPA Method 527 Surrogate Standard Back Catalog number: 95053 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 71957 6-Nitrochrysene Price on request 51106 Benzene and Toluene Calibration Blends Mix#1 Price on request 682835 3-Hydroxynaphthalene-2,7-disulfonic acid disodium Price on request