Selenium (Se) Back Catalog number: 57034 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 2538.14-100-ME Naproxen, 100µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 22204-53-1 Price on request L429-CS1,2,3,4,5 Individual Calibration Solutions , 1.0ml, isooctane Price on request 678474 Clopyralid, 100 µg/ml, Acetone, 1ml Price on request