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Magnesium hydride

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Products Intro: Product Name:Magnesium hydride;MgH2
CAS:7693-27-8
Purity:As coa Package:As request Remarks:7693-27-8
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CAS:7693-27-8
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CAS:7693-27-8
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Products Intro: Product Name:Magnesium hydride
CAS:7693-27-8
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Magnesium hydride Basic information
Product Name:Magnesium hydride
Synonyms:MagnesiuM hydride(MgH2);MgH2;MAGNESIUM HYDRIDE;MAGNESIUMHYDRIDE-NI-DOPED;magnesium dihydride;MAGNESIUM HYDRIDE, 90% (REMAINDER MAGNESIUM);Magnesium hydride hydrogen, storage grade;agnesiumhydride,98%
CAS:7693-27-8
MF:H2Mg
MW:26.32
EINECS:231-705-3
Product Categories:Materials for Hydrogen Storage;Metal Hydrides;Metal HydridesAlternative Energy;Reduction;Synthetic Reagents
Mol File:7693-27-8.mol
Magnesium hydride Structure
Magnesium hydride Chemical Properties
Melting point >250°C (dec.)
density 1.45
storage temp. water-free area
form white tetragonal crystals
Sensitive Moisture Sensitive
EPA Substance Registry SystemMagnesium hydride (MgH2) (7693-27-8)
Safety Information
Hazard Codes F,Xi
Risk Statements 15-11-36/37/38
Safety Statements 8-43A-43-36/37/39-26-16-7
RIDADR 2010
TSCA No
HazardClass 4.3
PackingGroup I
HS Code 28500090
MSDS Information
ProviderLanguage
ACROS English
ALFA English
Magnesium hydride Usage And Synthesis
DescriptionMgH2 contains 7.66% by weight of hydrogen and has been studied as a potential hydrogen-storage medium. It was discovered in 1912, during the pyrolysis of ethyl magnesium iodide (a Grignard reagent), which produced small amount of MgH2. In 1951, preparation from the elements was first reported involving direct hydrogenation of Mg metal at high pressure and temperature (200 atmospheres, 500°C)with magnesium iodide as a catalyst:
Mg+H2→MgH2
Lower temperature production from Mg and H2 using nano-crystalline Mg produced in ball mills has been investigated. Other preparations include:
1. The hydrogenation of magnesium anthracene under mild conditions:
Mg(anthracene)+H2→MgH2+C14H10 2. The reaction of diethyl magnesium with LiAlH4
3. An adduct of complexed MgH2, e.g. MgH2·THF by the reaction of phenylsilane (C6H8Si) and dibutyl magnesium in ether or hydrocarbon solvents in the presence of THF (C4H8O) using TMEDA (Tetramethylethylenediamine=(CH3)2NCH2CH2N (CH3)2) as a ligand.
Chemical PropertiesLight grey powder
Chemical PropertiesMagnesium hydride is a coarse, gray crystalline solid.
General DescriptionMagnesium hydride is a white crystalline solid. Magnesium hydride reacts violently with water and may ignite upon contact with air. Magnesium hydride is used to make other chemicals.
Air & Water ReactionsHighly flammable. Pyrophoric, ignites spontaneously in air and forms magnesium oxide and water [Merck 11th ed. 1989]. Reacts with water to form caustic solution of magnesium hydroxide and hydrogen gas (H2) and heat sufficient to ignite the evolved hydrogen [Merck 11th ed. 1989].
Reactivity ProfileHydrides, such as Magnesium hydride, are reducing agents and react rapidly and dangerously with oxygen and with other oxidizing agents, even weak ones. Thus, they are likely to ignite on contact with alcohols. Hydrides are incompatible with acids, alcohols, amines, and aldehydes.
Health HazardInhalation or contact with vapors, substance or decomposition products may cause severe injury or death. May produce corrosive solutions on contact with water. Fire will produce irritating, corrosive and/or toxic gases. Runoff from fire control may cause pollution.
Fire HazardProduce flammable gases on contact with water. May ignite on contact with water or moist air. Some react vigorously or explosively on contact with water. May be ignited by heat, sparks or flames. May re-ignite after fire is extinguished. Some are transported in highly flammable liquids. Runoff may create fire or explosion hazard.
Potential ExposureUsed in hydrogen production and in production of magnesium alcoholates.
ShippingUN2010 Magnesium hydride, Hazard Class: 4.3; Labels: 4.3-Dangerous when wet material.
IncompatibilitiesA strong reducing agent. Pyrophoric: the powder or dust may ignite spontaneously in air, or in the presence of moisture. Contact with water or steam forms magnesium hydroxide, flammable hydrogen gas, and enough heat to ignite the hydrogen. Violent reaction with oxidizers, alcohols, halogens, chlorinated solvents. Incompatible with strong acids, acid chlorides, alcohols, amines and aldehydes. Store under nitrogen. Decomposes @ 280C in high vacuum
Magnesium hydride Preparation Products And Raw materials
Tag:Magnesium hydride(7693-27-8) Related Product Information
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