EPA Method 502/524 Surrogate Standard #1 Back Catalog number: 30070 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 679649 1-Hydroxyibuprofen, 100 µg/ml, Acetonitrile, 1ml Price on request 72341 1-(2,6-Dichlorophenyl)-3-methylurea Price on request 71652 2-Chloroacrylonitrile Price on request