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Selenium
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- Atomic number: 34
- Density: 4.19 g/cm³
- Melting point: 221 °C
- boiling point: ~685 °C
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Purities available
- 99.5 % - 99.99 %
- 99.999%
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Forms of delivery
- Pieces
- Granules
- Powder
- Other forms on request
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packing
- Drums 50 kg and 100 kg
- Small quantities on request
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Selenium buyers information and prices
If you want to buy Selenium or find out our prices, please feel free to contact us.
Use of selenium
Selenium is essential for all forms of life. Therefore selenium compounds are offered as dietary supplement and as an additive in animal feedstuff and fertilisers. In the glass industry it is used for the decolouring of green glass and for the production of red coloured glass. It is also used for example in the photo conductor units of photocopying machines and laser printers and also, together with copper and indium, as component of the photoactive layer in solar cells.
History and occurrence
Selenium was discovered in 1817 by Jöns Jakob Berzelius in the lead chamber sludge of a sulphuric acid factory, which besides selenium contained also tellurium. Selenium occurs, mostly in form of metal selenides, together with the sulfurous ores of the metals copper, lead, zinc, gold and iron. When roasting these ores the solid senenium dioxide accumulates in the flue dust or as selenous acid in the subsequent sulfuric acid production.