EPA Method 552.2 - Surrogate Standard Back Catalog number: 30109 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 15900-2293-100AN1 Fenthion-sulfone, 100µg/ml in Acetonitrile, 1ml Price on request 10147.19 6-Acetylmorphine-13C3 (free base), , Solvent-, Unit , # of units-, Cas.no. Price on request 79043 Azobenzene Price on request