Selenium (Se) Back Catalog number: 50478 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended DD-1368-S 1,3,6,8-Tetrachlorodibenzo-p-dioxin, 1.2ml x 50ug/ml, nonane Price on request DF-IS-F40 Mass-Labelled PCDF Internal Standard Solution, 1.2ml, nonane Price on request 3735.12-100-IO 3,4,4'-Trichlorobiphenyl, 100µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 38444-90-5 Price on request