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7580-67-8 - Lithium hydride, 97+% - A17948 - Alfa Aesar

A17948 Lithium hydride, 97+%

Codice CAS
7580-67-8
Sinonimi

Dimensioni Prezzo ($) Quantità Disponibilità
50g 60,77
100g 102,56
250g 211,50
1000g 652,80
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Lithium hydride, 97+%

MDL
MFCD00011074
EINECS
231-484-3

Proprietà chimiche

Formula
HLi
Peso formula
7.95
Punto di fusione
688°
Densità
0.78
Sensibilità
Air & Moisture Sensitive
Solubilità
Reacts violently with water. Soluble in ether, liquid ammonia. Insoluble in benzene, and toluene.

Applicazioni

Used for preparation of anhydrous Li salts of carboxylic acids prior to reaction with organothium reagents (most often methyl or phenyl) as a useful route to ketones. Also used in the preparation of LiCN by reaction with acetone cyanohydrins. It is also applied as a desiccating and condensing agent and a shielding material in nuclear energy production. It is used in the manufacture of catalysts for polyolefin plastics; in fuels for aircraft, missiles. It is used in metallurgy, as degasifier, deoxidizer, desulfurizer; as grain refiner in non-ferrous metals. Employed as a chemical intermediate for butyllithium polymerization catalyst; in alloys with aluminum or magnesium for aerospace uses.

Note

Air & Moisture Sensitive. Store away from acids, alcohols, oxidizing agents, air, water/moisture. Keep the container tightly closed and place it in a cool, dry and well ventilated condition. Store under inert gas.

Letteratura

Takeshi Ohkuma.; Shohei Hashiguchi.; Ryoji Noyori. A practical method for activation of commercial lithium hydride: reductive silylation of carbonyl compounds with lithium hydride and chlorotrimethylsilane.J. Org. Chem.,1994,59(1), 217-221.

F.E. Pretzel.; G.N. Rupert.; C.L. Mader.; E.K. Storms.; G.V. Gritton.; C.C. Rushing. Properties of lithium hydride I. Single crystals.J. Phys. Chem. Solids.,1960,16(1-2), 10-20.

Used for preparation of anhydrous Li salts of carboxylic acids prior to reaction with organothium reagents (most often methyl or phenyl) as a useful route to ketones. For a comprehensive review of this method, see: Org. React., 18, 1 (1970). For an example (cyclohexyl methyl ketone), see: Org. Synth. Coll., 5, 775 (1973).

For preparation of LiCN by reaction with acetone cyanohydrin, see: Org. Synth. Coll., 7, 517 (1990).

A procedure for activation involves treatment with TMS chloride and a catalytic amount of Zn or a Zn salt. This reagent will reduce a ketone to the TMS ether of the alcohol: J. Org. Chem., 59, 217 (1994).

Rischio GHS e dichiarazioni precauzionali

Dichiarazioni di rischio (UE): H260-H314-H318

In contact with water releases flammable gases which may ignite spontaneously. Causes severe skin burns and eye damage. Causes serious eye damage.

Dichiarazioni precauzionali: P210-P231+P232-P262-P280-P305+P351+P338-P308-P310-P378m

Keep away from heat/sparks/open flames/hot surfaces. - No smoking. Handle under inert gas. Protect from moisture. Do not get in eyes, on skin, or on clothing. Wear protective gloves/protective clothing/eye protection/face protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. IF exposed or concerned: Immediately call a POISON CENTER or doctor/physician. Use for extinction: Limestone powder.

Altri riferimenti

Merck
14,5533
Classe di rischio
4.3
Gruppo di imballaggio
I
Codice tariffe armonizzato
2850.00
TSCA
Yes
RTECS
OJ6300000

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