Selenium (Se) Back Catalog number: 50478 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 677977 Ethion, 100 µg/ml, Toluene, 1ml Price on request 95779 Glycol Standard Price on request 675366 4-OH-Pyriproxyfen (4'-OH-Pyr), 10mg Price on request