EPA Method 525.2 Pesticide Level 4 Back Catalog number: 92843 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended MDD-23 2,3-Dichloro[13C12]dibenzo-p-dioxin, 1.2ml x 50ug/ml, toluene Price on request D230885 3-Demethyl Colchicine, 25mg Price on request 30037 4-Nitroanisole Price on request