Selenium (Se) Back Catalog number: 57134 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended A15987150AL-100 Perfluorooctanoic acid, 100µg/mL in Acetonitrile, 1ml Price on request TCC N-(4-chlorophenyl)-N'-(3,4-dichlorophenyl)urea , 1.2ml x 50ug/ml, methanol Price on request CS3WT EPA-1613CS3 + Window Defining/2378-TCDD Resolution Mix, 500ul, nonane Price on request