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Magnesium bromide

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Purity:99% Package:5KG;1KG Remarks:Br2Mg
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Magnesium bromide Basic information
Occurrence and Uses Physical Properties Preparation
Product Name:Magnesium bromide
Synonyms:Hydrobromic acid magnesium salt;Magnesium bromide (MgBr2);magnesiumbromide(mgbr2);MgBr2;MAGNESIUM BROMIDE;MAGNESIUM BROMIDE, ANHYDROUS, POWDER, 99 .995%;MagnesiuM broMide, 98%, pure, anhydrous;MAGNESIUM BROMIDE ANHYDROUS 98%
Product Categories:Inorganics;Inorganic Salts;Magnesium Salts;MagnesiumMetal and Ceramic Science;Salts;Synthetic Reagents;Chemical Synthesis;Crystal Grade Inorganics;Inorganic Salts;Magnesium;Magnesium Salts;Materials Science;Crystal Grade Inorganics;metal halide;Metal and Ceramic Science;Synthetic Reagents
Mol File:7789-48-2.mol
Magnesium bromide Structure
Magnesium bromide Chemical Properties
Melting point 711 °C(lit.)
Boiling point 1248.47°C (estimate)
density 3.72 g/mL at 25 °C(lit.)
form Powder
color off-white
Specific Gravity3.72
Water Solubility g/100g H2O: 100.6 (25°C), 125.4 (100°C); solid phase, MgBr2 ·6H2O [KRU93]
Merck 13,5681
CAS DataBase Reference7789-48-2(CAS DataBase Reference)
NIST Chemistry ReferenceMagnesium dibromide(7789-48-2)
EPA Substance Registry SystemMagnesium bromide (MgBr2)(7789-48-2)
Safety Information
Hazard Codes Xi
Risk Statements 36/37/38
Safety Statements 26-36
WGK Germany 1
MSDS Information
Magnesium bromide English
SigmaAldrich English
Magnesium bromide Usage And Synthesis
Occurrence and UsesMagnesium bromide occurs in sea water, surface and subterranean brines, and salt deposits. It is an electrolyte component in certain dry cells. In medicine, it is a sedative and anticonvulsant for treatment of nervous disorder. It also is used in organic synthesis forming several addition compounds.
Physical PropertiesThe anhydrous MgBr2 is a white crystalline substance; hexagonal crystals; deliquescent; density 3.72 g/cm3; melts at 700°C; highly soluble in water (101.5g/100mL at 20°C); moderately soluble in methanol and ethanol (21.8 and 6.9 g/mL at 20°C, respectively).
The hexahydrate, MgBr2•6H2O consists of colorless monoclinic crystals; bitter taste; hygroscopic; fluoresce in x-rays; density 2.07 g/cm3; melts at 172.4°C; intensely soluble in water, 316 g/100 mL at 0°C; dissolves in methanol and ethanol; slightly soluble in ammonia solution.
PreparationMagnesium bromide is prepared by treating magnesium oxide with hydrobromic acid and subsequent crystallization above 0°C. The product is hexahydrate, MgBr2•6H2O:
MgO + 2HBr → MgBr2 + H2O
The anhydrous MgBr2 may be obtained by heating the hexahydrate with dry hydrogen bromide gas. Magnesium bromide also can be made from its elements. Heating magnesium metal with bromine vapor yields the salt:
Mg + Br2 → MgBr2
Magnesium bromide, like the chloride salt, is obtained from sea water (see Magnesium and Magnesium chloride). In this process, magnesium hydroxide precipitated from sea water is neutralized with hydrobromic acid, and MgBr2 is obtained by crystallization.
Chemical PropertiesColorless, very deliquescent crystals; bitter taste. Soluble in water; slightly soluble in alcohol.
UsesOrganic syntheses, medicine (sedative).
Purification MethodsCrystallise it from EtOH or H2O (3.3g/mL). Dry it in a vacuum at ~150o, or heat the hydrate in a stream of HCl. It is very deliquescent. [Ehrlich in Handbook of Preparative Inorganic Chemistry (Ed. Brauer) Academic Press Vol I p 909 1963.]
Magnesium bromide Preparation Products And Raw materials
Preparation ProductsBromine-->DIMETHYL METHOXYMALONATE
Raw materialsBromine-->Dimethoate-->Magnesium hydroxide
Tag:Magnesium bromide(7789-48-2) Related Product Information
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