Selenium Dioxide
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Selenium Dioxide
General Characteristics
Cas No： 7446-08-4
Molecular Weight: 110.96
Chemical Formula: SeO2
Appearance: White, glittering squared crystal
Melting point : 340-350℃
Density: 3.95g/cm3(15℃)
Insoluble matter in water: 0.2%max.
Selenium Dioxide is prepared by oxidation of Selenium by burning in air, nitric acid or by reaction with Hydrogen Peroxide, but perhaps the most convenient preparation is by the dehydration of Selenous Acid.
Selenium dioxide oxidizes allylic C-H bonds, providing an option to synthesize allylic alcohols from alkenes. Even though SeO2 is a toxic reagent, it is used frequently since it mediates a transformation that is hard to effect by other means. The reaction conditions are mild too.
When re-oxidants such as TBHP (tert-butyl hydroperoxide) are used, SeO2 can be reduced to substoichiometric amounts.
Selenium dioxide is mainly used in the electrolytic manganese industry, each ton of electrolytic manganese production requires about 1 kg of selenium dioxide (each process is slightly different), the electrolytic manganese industry accounts for about 80% of the amount of selenium dioxide. Secondly, it is used in the feed industry to produce sodium selenite, and it is also used as a raw material for foliar selenium fertilizer for selenium-containing crops in the agro-industry. Others can also be used for: analytical purposes, precipitation of zirconium, hafnium. Characterization of alkaloids. Oxidant. Manufacture of other selenium compounds and high-purity selenium. Catalyst.
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Thermoelectric application
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Address: B-13, Nickel Copper Cobalt New Materials Industrial Park, National Economic and Technological Development Zone, Jinchang City, Gansu Province
Tel: 0935-5995998
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