Description

Product name:Selenium Molecular formula:Se Executive Standard:YSï&frac*4;T **3—***6 Trademark:Se*1, Se*2, Se*3 Product Description:Selenium is a chemical element with the atomic number *4, represented by the chemical symbol Se, an atomic mass of *8.*6. It is a nonmetal, chemically related to sulfur and tellurium, and rarely occurs in its elemental state in nature. Selenium is found in economic quantities in sulfide ores such as pyrite, partially replacing the sulfur in the ore matrix. Minerals that are selenide or selenate compounds are also known, but are rare. The chief commercial uses for selenium today are in glassmaking and in chemicals and pigments. Uses in electronics, once important, have been supplanted by silicon semiconductor devices.