Selenium (Se) Back Catalog number: 57834 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 677971 Chlorpyrifos, 100 µg/ml, Toluene, 1ml Price on request 675358 PCB 108, 5mg Price on request XA15170000AL Metolachlor, 100µg/mL in Acetonitrile, 1ml Price on request