Selenium (Se) Back Catalog number: 57834 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 9504.11-100-IO Terbutryn-d5 (ethyl-d5), 100µg/mL, Solvent-acetonitrile, Unit 1mL, # of units-1, Cas.no. 1219804-47-3 Price on request EPA-533ES EPA Method 533 Isotope Dilution Standard PDS, 1.2ml, methanol Price on request MET-12346D-100MG Malathion monocarboxylic acid, 100mg Price on request