Selenium pellets, 99.9%

Selenium is a chemical element wi seembol Se an atomic nummer 34. It rarely occurs in its elemental state in naitur, or as pure ore compoonds.

S 0030 (OTTO) Selenium pellets, 99.9% Cas 7782-49-2 - used because of issues with toxicity. In X-ray crystallography, incorporation of one or more selenium atoms in place of sulfur helps with multiple-wavelength anomalous dispersion and single wavelength anomalous dispersion phasing.