Selenium (Se) Back Catalog number: 57834 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 680236 trans-3-Hydroxycotinine, 100 µg/ml, Methanol, 1m Price on request 675628 Isoxathion, 100 µg/ml, Ethyl acetate, 5ml Price on request MET-11013A-25MG Acetochlor ESA sodium salt, 25mg Price on request