Magnesium oxide CAS# 1309-48-4

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• Chemical Name:  Magnesium oxide
• CAS No.:     1309-48-4
• Molecular Fomula: ：MgO
• Molecular weight：40.3
• Appearance: wjite powder
• Sample：Available

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Description of seawatermagnesia

• Magnesium oxide (MgO), or magnesia, is a white hygroscopic solid mineral that occurs naturally as periclase and is a source of magnesium (see also oxide). It has an empirical formula of MgO and consists of a lattice of Mg2+ ions and O2− ions held together by ionic bonding. Magnesium hydroxide forms in the presence of water (MgO + H2O → Mg(OH)2), but it can be reversed by heating it to separate moisture.
  Magnesium oxide was historically known as magnesia alba (literally, the white mineral from magnesia – other sources give magnesia alba as MgCO3), to differentiate it from magnesia negra, a black mineral containing what is now known as manganese.
  While “magnesium oxide” normally refers to MgO, magnesium peroxide MgO2 is also known as a compound. According to evolutionary crystal structure prediction, MgO2 is thermodynamically stable at pressures above 116 GPa (gigapascals), and a totally new semiconducting suboxide Mg3O2 is thermodynamically stable above 500 GPa. Because of its stability, MgO is used as a model system for investigating vibrational properties of crystals.

Basic Info of seawatermagnesia

Basic Info
Numbering system
Properties
Safety Info
Basic Info

Numbering system

Properties

Safety Info

What is Magnesium oxide ?

• With the progress of science and technology and the development of society, chemical products have invariably permeated our daily lives, in medicine, food, cosmetics, electronics, industry, and other areas, becoming an essential part of our lives. One such product is Magnesium oxide   which has developed particularly rapidly in recent years. Do you know about Magnesium oxide?
• The official answer：Magnesium oxide is commonly known as bitter earth, also known as magnesium oxide. It is a typical alkaline earth metal oxide, chemical formula MgO. white powder, melting point is 2852℃, the boiling point is 3600℃, relative density is 3.58(25℃). Soluble in acid and ammonium salt solution. Slowly interact with water to produce magnesium hydroxide. Can be dissolved in a carbon dioxide aqueous solution to produce magnesium bicarbonate. The air can gradually absorb water and carbon dioxide, heating emits irritating fumes. Magnesite (MgCO3), dolomite (MgCO3-CaCO3), and seawater are the main raw materials for producing magnesium oxide. Thermal decomposition of magnesite or dolomite to get magnesium oxide. Treatment of seawater with slaked lime to get magnesium hydroxide precipitate, burning magnesium hydroxide to get magnesium oxide. Also can be used in the comprehensive utilization of seawater magnesium chloride brine block or bromine brine as raw material, add sodium hydroxide or sodium carbonate, etc. to generate magnesium hydroxide or alkaline magnesium carbonate precipitation, and then cauterized to get magnesium oxide. At present, China mainly adopts magnesite, dolomite, brine, or brine block as raw materials.

What’s the application of Magnesium oxide ?

• 1, one of the main uses of magnesium oxide is used as a flame retardant, traditional flame retardant materials, widely used halogen-containing polymers, or halogen-containing flame retardant combination of flame-retardant mixtures. 2, another use of magnesium oxide can be used as a neutralizing agent, magnesium oxide alkaline, good adsorption properties, can be used as acid-containing waste gas, wastewater treatment, heavy metals, and organic waste treatment, and other neutralizing agents, with the increase in environmental requirements. Domestic demand is growing rapidly. 3, pressed fine magnesium oxide can be used as optical coatings. Coating thickness between 300 mm to 7 mm, the coating is transparent. 1 mm thick coating refractive index of 1.72. 4, used for climbing stone use, can absorb hand sweat, (Note: inhalation of magnesium oxide smoke can lead to metal smog disease.) 5, mainly used for the preparation of internal medication to neutralize excess stomach acid. Commonly used preparations are: magnesium milk – emulsion; magnesium cover tablets – each piece contains MgO0.1g; acid making scatter – magnesium oxide and sodium bicarbonate mixed into the bulk, etc. 6, light magnesium oxide is mainly used for the preparation of ceramics, enamel, the refractory crucible, and refractory brick raw materials. Also used as a polish binder and paper filler, neoprene, and fluorine rubber accelerator and activator. Depending on the preparation method, there is light and heavyweight. Strongly refractive in the visible and near-ultraviolet range. It is easy to absorb water and carbon dioxide in the open air and gradually become alkaline magnesium carbonate, lightweight is faster than heavyweight and combines with water to form magnesium hydroxide, slightly alkaline reaction, pH 10.3 in saturated water solution. It is used as the standard of white pigment. Used in the manufacture of ceramics, enamels, refractory crucibles, and refractory bricks. Used as a polishing agent, adhesive, paint and paper filler, accelerator, and activator of neoprene and fluorine rubber, mixed with magnesium chloride and other solutions, can be made of magnesium oxide cement. Used as antacid and laxative in medicine, used for excessive stomach acid, stomach, and duodenal ulcer disease. Also used in glass, dyestuff, phenolic plastics, and other industries. Food grade used as a decolorizer in sugar refining, Ph regulator for ice cream powder, etc. Use in papermaking, chemical industry, building materials, rubber, ceramics, animal husbandry, and manufacture of magnesium sand. Uses rice milling industry used to burn sand roller, sand attack, building materials industry used in artificial seamless floor, artificial marble, heat-proof board, and sound insulation board. Used in chemical industry and rubber, plastic, steel ball polishing industry. Widely used as high-temperature heat-resistant materials. In the field of ceramics, it is used as raw material for the translucent ceramic crucible, substrate, etc. Used as a filler for magnetic devices, insulating material filler, and various carriers in electronic materials and electrical fields. It is also used as a filler for heat-resistant coatings.

Conclusion

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