Selenium (Se) Back Catalog number: 57034 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 53056 Mixed Calibration Standard 4 Price on request 71823 1-Chloro-3,4-dinitrobenzene Price on request T-PFOS Potassium perfluorooctanesulfonate (Technical Grade), 1.2ml x 50ug/ml, methanol Price on request