Overview of Selenium powder：

Selenium is a non-metallic element with the chemical symbol Se, which is located in the fourth cycle of the periodic table of chemical elements, group VI A (element 34). It can be used as photosensitive materials, catalysts in the electrolytic manganese industry, essential nutrients for animal bodies, and beneficial nutrients for plants. Selenium exists in nature in two ways: inorganic selenium and plant-active selenium. Inorganic selenium generally refers to sodium selenite and sodium selenate, obtained from the by-products of metal deposits; the latter is selenium combined with amino acids through biological transformation, generally in the form of selenomethionine.

The CAS number of selenium is 7782-49-2, the EINECS number is 231-957-4, the melting point is 221 ℃, the boiling point is 684.9 ℃, water solubility: insoluble in water, alcohol, soluble in sulfuric acid, nitric acid, alkali. The density is 4.81 g/cm³. The appearance is gray solid with a metallic luster.

Selenization means that hydrogen selenide dissolved in water can precipitate many heavy metal ions into particles. Selenium and metals in the oxidation state +1 can generate two kinds of selenides, namely normal selenides (m2se) and acid selenides. Selenium is one of the trace elements necessary for human body and biology. It can regulate the absorption and consumption of vitamins A, C, E, and K, cooperate with vitamin E to protect cell membranes, and participate in the catalytic reactions of various enzymes in the body. It is an essential component of glutathione peroxidase (GSH-Px) and iodothyronine deiodinase (ID).

Application of selenium powder：

Selenium powder is used in electronics, glass, metallurgy, chemical industry, medical treatment, agriculture and other fields.

Selenium has photosensitivity and semiconductor properties, and is often used in the electronics industry to manufacture photovoltaic cells, photoreceptors, laser devices, infrared controllers, photocells, photoresistors, optical instruments, photometers, rectifiers, etc. The use of selenium in the electronics industry accounts for about 30% of the total demand.

Selenium and selenide powder are important semiconductor materials with excellent photoelectric properties.

Selenide powders supplier ：

We supplies high-purity and ultra-fine selenide powders, such as indium selenide In2Se3, bismuth selenide Bi2Se3, tungsten selenide, gallium selenide, copper selenide, cadmium selenide CdSe, etc. Send an email or click on the desired product to send an inquiry.

Payment Term:

T/T, Credit Card, Western Union, Paypal etc.

Term for delivery:

By air, courier or by sea according to the needs of the customer.

Conditions of storage:

1.) Maintain a dry area at the temperature of room.

2.) Avoid high and damp temperatures.

3.) Utilize immediately following the opening of the bag inside.

FAQ：

Q1:

What is selenium powder? 

Re：Selenium powder is a kind of selenium-supplementing health care product, which has the functions of supplementing nutrition, enhancing immunity, anti-oxidation, preventing cardiovascular and cerebrovascular diseases, improving eyesight, and so on.

Selenium powder contains a certain amount of selenium, and selenium is an essential trace element in the human body; an appropriate amount of selenium powder can supplement the selenium needed by the human body so as to maintain the balance of nutrition in the body. In addition, selenium powder also has antiviral and antibacterial, reducing inflammation and other effects.

Q2:

What is the effect of selenium powder? 

Re：Supplemental nutrition: Selenium powder is a trace element supplement, which is rich in selenium; moderate consumption can supplement the selenium needed for the human body and help to promote the body's metabolism so as to achieve the role of supplemental nutrition.

Antioxidant: Selenium powder can remove free radicals in the body, help reduce the production of wrinkles, play an antioxidant role, and promote the metabolism of the skin, thereby improving the skin condition.

Improve vision: Selenium can promote the production of rhodopsin in the retina, improve vision, and reduce eye fatigue.

Help improve cardiovascular and cerebrovascular diseases: Selenium can promote blood circulation in the body but also reduce the viscosity of blood, thereby improving the symptoms of patients with cardiovascular and cerebrovascular diseases.

Q3:

What are the advantages of selenium powder? 

Re：Anti-oxidation, anti-aging: Selenium in selenium powder is an important antioxidant that can remove free radicals in the body, thereby delaying the aging process.

Boost immunity: Selenium powder can boost the body's immunity and help prevent infections and diseases.

Promote metabolism: Selenium powder can promote the body's metabolism, help burn calories, and break down fat, thus helping to control weight.

Auxiliary treatment of certain diseases: Appropriate supplementation of selenium powder can assist in the treatment of some diseases, such as Keshan disease, Kashin-beck disease, etc.

Q4:

What is the main selenium powder? 

Re：Sodium selenate: Sodium selenate is an inorganic substance with the chemical formula Na₂SeO₄. It is a white to light yellow crystalline powder. It is almost odorless and tasteless. It is easily weathered in the air and quickly transformed into insoluble selenic acid at room temperature. Sodium selenate can be used to prepare inorganic selenium salts, organic selenium compounds, and other selenium-containing inorganic substances.

Zinc selenite: Zinc selenite is an inorganic compound with the formula ZnSeO₃ in a white or slightly yellow powder. Zinc selenite is used in the photographic industry, the production of film expansion tubes, film, television screens, and other special luminous agents, and can also be used in the production of phosphors, fluorescent lamps, and so on.

Lead selenite: Lead selenite is an inorganic compound with the formula PbSeO₃ and is a white crystalline powder. Lead selenite is used in the preparation of other lead salts, organometallic compounds, halides, and intermediates of organic compounds.

Q5:

What material is used for the preparation of selenium powder? 

Re：In industry, selenium powder is mainly separated from anode slime during the electrolysis of copper or lead. Selenium dioxide was obtained by roasting the anode slime and then treated. It can also be obtained by sulfur dioxide reduction method, under stirring, into the concentration of 170g/L selenium dioxide aqueous solution (selenite solution, Se is 130 g/L), through the sulfur dioxide gas washed by water and dilute sulfuric acid, at 75℃ thoroughly stirred for reduction reaction, can get more than 200 mesh hexagonal crystalline black fine selenium powder.