Degradation Calibration Mixture Back Catalog number: 91977 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 79411 2,4-D, butoxyethanol ester Price on request 81204 EPA Method 8121 Surrogate Standard Price on request A608801-5MG 2-Aminodipyrido[1,2-a:3',2’-d]imidazole Dihydrochloride, 5mg Price on request