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Lithium Aluminum Hydride

Product Name
Lithium Aluminum Hydride
CAS No.
16853-85-3
Chemical Name
Lithium Aluminum Hydride
Synonyms
LAH;LiAlH4;ithium aL;uminium hydride;LITHIUM ALANATE;Lithium Aluminium Hy;Lithium aluminohydride;LithiuM AluMiniuM Hydri;LithiumAluminnumHydride;LITHIUMALUHYDRID S 250G
CBNumber
CB7318252
Molecular Formula
LiAlH4
Formula Weight
37.954298
MOL File
16853-85-3.mol
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Lithium Aluminum Hydride Property

Melting point:
125 °C (dec.)(lit.)
Boiling point:
0°C
Density 
0.97 g/mL at 20 °C
Flash point:
99 °F
storage temp. 
Store below +30°C.
form 
tablets (~0.5 g each)
Specific Gravity
0.917
color 
White to light gray
Odor
Odorless solid
Water Solubility 
Reacts
Sensitive 
Air & Moisture Sensitive
Hydrolytic Sensitivity
8: reacts rapidly with moisture, water, protic solvents
Merck 
14,350
Exposure limits
TLV-TWA 2 mg(Al)/m3 (ACGIH).
Stability:
Stable. Reacts violently with water, liberating hydrogen. Incompatible with strong oxidizing agents, alcohols, acids.
CAS DataBase Reference
16853-85-3(CAS DataBase Reference)
NIST Chemistry Reference
Lithium tetrahydroaluminate(16853-85-3)
EPA Substance Registry System
Lithium aluminum hydride (16853-85-3)
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Safety

Hazard Codes 
F,C,Xi,Xn,F+,T
Risk Statements 
15-34-14/15-11-36/37-19-40-10-67-66-22-12-35-37-65-48/20-63-36/38-61-60
Safety Statements 
43-7/8-6A-45-43B-36/37/39-33-26-16-24/25-27-29-62-53
RIDADR 
UN 3399 4.3/PG 1
WGK Germany 
2
RTECS 
BD0100000
10-21
TSCA 
Yes
HS Code 
2850 00 20
HazardClass 
4.3
PackingGroup 
I
Hazardous Substances Data
16853-85-3(Hazardous Substances Data)
Toxicity
TLV-TWA (ACGIH) 2 mg (Al)/m3
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Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal word
Danger
Hazard statements

H224Extremely flammable liquid and vapour

H225Highly Flammable liquid and vapour

H226Flammable liquid and vapour

H228Flammable solid

H260In contact with water releases flammable gases which may ignite spontaneously

H301Toxic if swalloed

H302Harmful if swallowed

H304May be fatal if swallowed and enters airways

H314Causes severe skin burns and eye damage

H315Causes skin irritation

H318Causes serious eye damage

H319Causes serious eye irritation

H330Fatal if inhaled

H333May be harmful if inhaled

H335May cause respiratory irritation

H336May cause drowsiness or dizziness

H351Suspected of causing cancer

H360May damage fertility or the unborn child

H361Suspected of damaging fertility or the unborn child

H371May cause damage to organs

H372Causes damage to organs through prolonged or repeated exposure

H373May cause damage to organs through prolonged or repeated exposure

Precautionary statements

P201Obtain special instructions before use.

P210Keep away from heat/sparks/open flames/hot surfaces. — No smoking.

P223Keep away from any possible contact with water, because of violent reaction and possible flash fire.

P233Keep container tightly closed.

P240Ground/bond container and receiving equipment.

P241Use explosion-proof electrical/ventilating/lighting/…/equipment.

P260Do not breathe dust/fume/gas/mist/vapours/spray.

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P262Do not get in eyes, on skin, or on clothing.

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

P270Do not eat, drink or smoke when using this product.

P271Use only outdoors or in a well-ventilated area.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P284Wear respiratory protection.

P231+P232Handle under inert gas. Protect from moisture.

P308IF exposed or concerned:

P303+P361+P353IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

P308+P313IF exposed or concerned: Get medical advice/attention.

P335+P334Brush off loose particles from skin. Immerse in cool water/wrap in wet bandages.

P337+P313IF eye irritation persists: Get medical advice/attention.

P370+P378In case of fire: Use … for extinction.

P405Store locked up.

P422Store contents under …

P402+P404Store in a dry place. Store in a closed container.

P403+P233Store in a well-ventilated place. Keep container tightly closed.

P403+P235Store in a well-ventilated place. Keep cool.

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N-Bromosuccinimide Price

Sigma-Aldrich
Product number
8.0566A
Product name
Lithium aluminium hydride
Purity
(powder) for synthesis
Packaging
10 g
Price
$36.81
Updated
2021/03/22
Sigma-Aldrich
Product number
199877
Product name
Lithium aluminum hydride
Purity
powder, reagent grade, 95%
Packaging
10g
Price
$40
Updated
2021/03/22
Sigma-Aldrich
Product number
62420
Product name
Lithium aluminum hydride
Purity
≥97.0% (gas-volumetric)
Packaging
10 g
Price
$43.9
Updated
2021/03/22
Sigma-Aldrich
Product number
8.1887A
Product name
Lithium aluminium hydride
Purity
(powder) for synthesis
Packaging
25 g
Price
$63.36
Updated
2021/03/22
Sigma-Aldrich
Product number
62420
Product name
Lithium aluminum hydride
Purity
≥97.0% (gas-volumetric)
Packaging
50 g
Price
$104
Updated
2021/03/22
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Lithium Aluminum Hydride Chemical Properties,Usage,Production

Chemical Properties

Lithium aluminum hydride is a white to gray powder. A combustible solid. monoclinic crystals; grey in the presence of aluminum impurity; stable below 120°C in dry air; turns grey on standing; hygroscopic; density 0.917 g/cm3; melts at 190°C (decomposes); reacts with water and alcohols; soluble in diethylether and tetrahydrofuran (about 30 and 13 g/100g, respectively at 25°C; also soluble in dimethylcellosolve; sparingly soluble in dibutylether; slightly soluble in dioxane (1g/L) and practically insoluble in hydrocarbons; can be solubilized in benzene by crown ether.

Physical properties

White crystalline powder when pure; monoclinic crystals; grey in the presence of aluminum impurity; stable below 120°C in dry air; turns grey on standing; hygroscopic; density 0.917 g/cm3; melts at 190°C (decomposes); reacts with water and alcohols; soluble in diethylether and tetrahydrofuran (about 30 and 13 g/100g, respectively at 25°C; also soluble in dimethylcellosolve; sparingly soluble in dibutylether; slightly soluble in dioxane (1g/L) and practically insoluble in hydrocarbons; can be solubilized in benzene by crown ether.

Uses

It is used as a powerful reducing agent inorganic synthesis. Except for olefinic doublebonds, almost all organic functional groupsare reduced by lithium aluminum hydride(Sullivan and Wade 1980). It is used extensivelyin pharmaceutical synthesis and in catalytichydrogenation.

Uses

Lithium aluminum hydride is among the most important industrial reducingagents. It is used extensively in organic syntheses and also in catalytichydrogenation. Reactant or reagent for:
1. The preparation of thermoplastic polyester polyamides from oleic acid
2. Lithium-polymer batteries
3. Hydrodefluorination of gem-difluoromethylene derivatives
4. Asymmetric aldol reactions
5. Synthesis of Li-Al-N-H composites with hydrogen absorption / desorption properties
6. LAH is a powerful reducing agent for many different reduction reactions such as that of ketones to alcohols

Uses

Reducing agent; in preparation of other hydrides.

Preparation

Lithium aluminum hydride is prepared by reaction of lithium hydride with aluminum chloride in diethylether:
4LiH + AlCl3 →(C2H5)2O→LiAlH4+3LiCl

General Description

A white powder that turns gray on standing. If spread out over a large flat combustible surface, friction can cause ignition. Used to make other chemicals, as a polymerization catalyst, as a hydrogen source, and as a propellant.

Air & Water Reactions

Reacts with water vigorously attaining incandescence and ignition of evolved hydrogen [Kelen, Cahiers, 1977, (86), 100]. Reactions with water or moist air (or heated air) are violent and may be explosive [Schmidt, D.L., et al. Inorg. Synth. 1973. p. 14, 51].

Reactivity Profile

Lithium aluminium hydride is a powerful reducing agent. React violently on contact with many oxidizing agents. Ignites by friction, especially if powdered. Reacts vigorously with hydroxy compounds such as water, alcohols, carboxylic acids [Mellor 2 Supp. 2:142. 1961]. Caused a violent explosion when used to dry diethylene glycol dimethyl ether: Ignition may have been caused by heat from reaction with impurity water or perhaps decomposition of peroxides in the ether. About 75% of the ether had been removed when the explosion occurred [MCA Case History 1494. 1968]. Reduces carbon dioxide or sodium hydrogen carbonate to methane and ethane at elevated temperatures. These flammable or explosive gases can form when CO2 extinguishers are used to fight hydride fires. Forms explosive complexes with ether, dimethylamine and various tetrazoles. Tetrazoles include, 2-methyl, 2-ethyl, 5-ethyl, 2-methyl-5-vinyl, 5-amino-2-ethyl [US Pat. 3 396 170, 1968].

Hazard

Lithium aluminum hydride is a flammable substance. It ignites spontaneously on grinding and reacts violently with water and many organic substances. Diethyl ether, tetrahydrofuran or another suitable solvent should be used in its synthetic applications. Dry or powdered limestone is an appropriate fire extinguishing agent.

Health Hazard

Lithium aluminum hydride is highly corrosive to the skin, eyes, and mucous membranes. Contact with moisture forms lithium hydroxide, which can cause severe burns. Powdered LAH forms dusts that can pose an inhalation hazard. Ingestion of this substance may cause aching muscles, nausea, vomiting, dizziness, and unconsciousness and may be fatal. Ingestion can result in gas embolism due to the formation of hydrogen.
No chronic effects of lithium aluminum hydride have been identified

Flammability and Explosibility

Lithium aluminum hydride is a highly flammable solid and may ignite in moist or heated air. Exposure to water results in the release of hydrogen, which can be ignited by the heat from the exothermic reaction. Lithium aluminum hydride should not be used as a drying agent for solvents because fires can easily result (LAH decomposes at about 125° C, a temperature easily reached at a flask's surface in a heating mantle). The decomposition products of LAH can be quite explosive, and the products of its reaction with carbon dioxide have been reported to be explosive. Use dry chemical powder or sand to extinguish fires involving lithium aluminum hydride. Never use water or carbon dioxide extinguishers on an LAH fire.

Safety Profile

Stable in dry air at room temperature. It decomposes above 125' forming Al, H2, and lithium hydride. Very powerful reducer. Can ignite if pulverized even in a dry box. Reacts violently with air, acids, alcohols, benzoyl peroxide, boron trifluoride etherate, (2 chloromethyl furan + ethyl acetate), diethylene glycol dimethyl ether, diethyl ether, 1,2-dimethoxyethane, dimethyl ether, methyl ethyl ether, (nitriles + H2O), perfluorosuccinamide, (perfluorosuccinamide + H20), tetrahydrofuran, water. To fight fire, use dry chemical, includmg special formulations of dry chemicals as recommended by the supplier of the lithium aluminum hydride. Do not use water, fog, spray, or mist. Incompatible with bis (2-methoxyethyl)ether, CO2, BF3, diethyl etherate, dibenzoyl peroxide, 3,5 dbromocyclopentene, 172-dimethoxy ethane, ethyl acetate, fluoro amides, pyridine, tetrahydrofuran. Used as a reducing agent in the preparation of pharmaceuticals. See also ALUMINUM, LITHIUM COMPOUNDS, and HYDRIDES.

Potential Exposure

This material is used as a catalyst and as a specialty reducing agent in organic synthesis.

storage

LAH should be handled in areas free of ignition sources under an inert atmosphere. Safety glasses, impermeable gloves, and a fire-retardant laboratory coat are required. A dry powder fire extinguisher or pail of sand (and shovel) must be available in areas where LAH is to be handled or stored. Work with large quantities of powdered LAH should be conducted in a fume hood under an inert gas such as nitrogen or argon. Lithium aluminum hydride should be stored in tightly sealed containers in a cool, dry area separate from combustible materials. Dry LAH powder should never be exposed to water or moist air. Lithium aluminum hydride can be a finely powdered reagent that produces a reactive dust on handling. The older practice of grinding lithium aluminum hydride prior to use can cause explosions and should not be employed.

Shipping

UN1410 Lithium aluminum hydride (dry), Hazard Class: 4.3; Labels: 4.3-Dangerous when wet material. UN1411 Lithium aluminum hydride, ethereal, Hazard Class: 4.3; Labels: 4.3-Dangerous when wet material, 3- Flammable liquid.

Purification Methods

Extract it with Et2O, and, after filtering, the solvent is removed under vacuum. The residue is dried at 60o for 3hours, under high vacuum [Ruff J Am Chem Soc 83 1788 1961]. It is a strong reducing agent. It IGNITES in the presence of a small amount of water and reacts with it EXPLOSIVELY. [Becher in Handbook of Preparative Inorganic Chemistry (Ed. Brauer) Academic Press Vol I p 805 1963.]

Incompatibilities

Combustible solid. Can ignite spontaneously in moist air or heat. Decomposes on heating @ 125C forming aluminum, lithium hydride and flammable hydrogen gas. A strong reducing agent; violent reaction with oxidizers. Violent reaction with water, alcohols, acids, dimethylether, ethers, tetrahydrofuran, benzoyl peroxide; boron trifluoride etherate. Reduces carbon dioxide or sodium hydrogen carbonate to methane and ethane at elevated temperatures. These flammable or explosive gases can form when CO2 extinguishers are used to fight hydride fires. Forms explosive complexes with ether, dimethylamine and various tetrazoles. Tetrazoles include, 2-methyl, 2-ethyl, 5-ethyl, 2-methyl-5-vinyl, 5-amino-2-ethyl .

Waste Disposal

Small amounts of excess LAH can be destroyed by forming a suspension or solution in an inert solvent such as diethyl ether or hexane, cooling in an ice bath, and slowly and carefully adding ethyl acetate dropwise with stirring. This is followed by the addition of a saturated aqueous solution of ammonium chloride.
Excess lithium aluminum hydride and the products of the treatment described above should be placed in an appropriate container, clearly labeled, and handled according to your institution's waste disposal guidelines. For more information on disposal procedures, see Chapter 7 .

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Lithium Aluminum Hydride Suppliers

Gansu Junmao New Materials Science and Technology Co., Ltd.
Tel
022-27435750-
Fax
022-27435750
Email
sales@jm-hydride.com
Country
China
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J & K SCIENTIFIC LTD.
Tel
010-82848833- ;010-82848833-
Fax
86-10-82849933
Email
jkinfo@jkchemical.com;market6@jkchemical.com
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China
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Adamas Reagent, Ltd.
Tel
400-600-9262
Email
bxy@titansci.com
Country
China
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13915
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Zhangjiagang Aixin Chemical Co.,Ltd.
Tel
0512-58583037
Fax
0512-58583067
Email
sales@aixinchem.com
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China
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Shanghai Huayu Industrial Co., Ltd.
Tel
18917588395
Email
3346096010@qq.com
Country
CHINA
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Infinity SCI
Tel
400-106-2016
Email
biz10@infsci.com
Country
China
ProdList
3094
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Cangzhou Lingang Xingchen Chemical Co.Ltd.
Tel
022-87893067- ;022-87892270-
Email
sales@daofuchem.com;3549508526@qq.com
Country
China
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Nanjing Spcscientific Technology Co., Ltd.
Tel
Fax
QQ25788917
Email
sales1@spcscientific.com
Country
China
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Wuhan EnTai Technology Development Co,.Ltd
Tel
86-27-82330560
Fax
86-27-82330547
Email
2536851935@qq.com
Country
China
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Meryer (Shanghai) Chemical Technology Co., Ltd.
Tel
21-61259100-
Fax
86-21-61259102
Email
sh@meryer.com
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China
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40264
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View Lastest Price from Lithium Aluminum Hydride manufacturers

Hanhong Medicine Technology (Hubei) Co., Ltd.
Product
Lithium Aluminum Hydride 16853-85-3
Price
US $0.00/KG
Min. Order
1KG
Purity
99%
Supply Ability
10 ton
Release date
2021-05-26
Hebei Senko Biotechnology Co., Ltd.
Product
Lithium Aluminum Hydride 16853-85-3
Price
US $100.00/KG/Tin
Min. Order
1KG
Purity
99%
Supply Ability
10Tons
Release date
2021-07-20
Hebei Zhanyao Biotechnology Co. Ltd
Product
Lithium aluminium hydride 16853-85-3
Price
US $100.00/KG
Min. Order
1KG
Purity
Above 99%
Supply Ability
5000kg/month
Release date
2021-03-09

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