EPA Method 550 Analytes Back Catalog number: 31051 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended XA17875000AL Trimethoprim, 100μg/mL in Acetonitrile, 1ml Price on request C17723500 1,3,5-Trichlorobenzene, certified, 0.25g Price on request MDD-1234678 1,2,3,4,6,7,8-Heptachloro[13C12]dibenzo-p-dioxin, 1.2ml x 50ug/ml, toluene Price on request