Selenium
Product Details
Specifications provided
Black powder
Content ≥ 99%
(Scope of application reference ‘product usage’)
Selenium has four allomorphs: gray hexagonal metallic selenium, slightly blue, with a relative density of 4.81g/cm³ (20℃ and 405.2kPa), melting point of 220.5℃, boiling point of 685℃, insoluble in water, carbon disulfide and ethanol, soluble in sulfuric acid and chloroform; Red monoclinic crystal selenium, relative density is 4.39g/cm³, melting point 221℃, boiling point 685℃, insoluble in water, ethanol, slightly soluble in ether, soluble in sulfuric acid and nitric acid; The relative density of red amorphous selenium is 4.26g/cm³, and the relative density of black glassy selenium is 4.28g/cm³. It is converted into hexagonal selenium at 180℃, and the boiling point is 685℃. It is insoluble in water and slightly soluble in carbon disulfide.
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Product Parameter
7782-49-2
231-957-4
78.96
Non-metallic element
4.81 g/cm³
Insoluble in water
685 ℃
220.5°C
Product Usage
Industrial use
Selenium has both photoelectric and photosensitive properties. Photoelectric performance can convert light directly into electricity, and photosensitive performance can reduce resistance when increasing light. The photoelectric and photosensitive properties of selenium can be used in the production of photocells and exposure meters for cameras and solar cells. Selenium can convert alternating current into direct current, so it is widely used in the manufacture of rectifiers. Selenium elemental is a P-type semiconductor that can be used in circuits and solid-state components. In photocopying, selenium can be used to copy documents and letters (toner cartridges). In the glass industry, selenium can be used to produce decolorized glass, ruby colored glass and enamel.
Meidical grade
Boost immunity
Plant active selenium can clear free radicals in the body, eliminate toxins in the body, antioxidant, can effectively inhibit the production of lipid peroxide, prevent blood clots, remove cholesterol, and enhance human immune function.
Prevent diabetes
Selenium is the active component of glutathione peroxidase, which can prevent the oxidative destruction of islet beta cells, make them function normally, promote sugar metabolism, reduce blood sugar and urine sugar, and improve the symptoms of diabetes patients.
Prevent cataract
The retina is vulnerable to damage due to more exposure to computer radiation, selenium can protect the retina, enhance the finish of the vitreous body, improve eyesight, and prevent cataracts.
