Selenium (Se) Back Catalog number: 57234 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 3514.8-100-CY Thionazin-O-analog Price on request 30941 Methomyl Price on request 1265.8-K-ME p-Xylene, 1000µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 106-42-3 Price on request