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Lithium Aluminium Tetrahydride CAS 16853-85-3

Molecular Formula: LiAlH4

Formula Weight: 37.954298

ZSpharmac: Lithium Aluminium Tetrahydride  Supplement

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Product Name: Lithium Aluminium Tetrahydride
CAS No: 16853-85-3
Purity: 99%

Basic Info

Product Name:Lithium Aluminium Tetrahydride
Other Names:Lithium Aluminum Hydride
CAS:16853-85-3
Place of Origin:Shandong, China
Brand Name:ZSpharmac
Type:Inorganic Chemical Raw Materials
Appearance:Crystalline Solid
EINECS No.:262-390-0
Storage:White to Light Gray Powder
Provide:Lithium Aluminium Tetrahydride MSDS;
Lithium Aluminium Tetrahydride COA

What is Lithium Aluminium Tetrahydride ?

Lithium Aluminium Tetrahydride is a frequently made use of decreasing reagent in natural chemistry, which can decrease a selection of functional compounds; at the same time, it can additionally act on dual bond as well as three-way bond substances to accomplish alumination response; lithium light weight aluminum hydride can additionally join the response as a base. Lithium Aluminium Tetrahydride has a strong hydrogen transfer ability, efficient in reducing aldehydes, ketones, esters, lactones, carboxylic acids, anhydrides as well as epoxides to alcohols, or transforming amides, imide ions, nitriles and aliphatic nitro substances for the matching amine. Furthermore, the superior lowering power of Lithium Aluminium Tetrahydride allows the action of various other practical groups, such as the decrease of halogenated alkanes to alkanes. In this kind of reaction, the task of halides is iodide, bromide and chloride in descending order. Lithium Aluminium Tetrahydride and also solutions are extremely flammable and also have to be separated from air, wetness, and also ideally kept under a nitrogen environment.

Lithium Aluminium Tetrahydride Properties:

Melting point 125 °C (dec.)(lit.)
Boiling point 0°C
density 0.97 g/mL at 20 °C
Fp 99 °F
storage temp. Store below +30°C.
form tablets (~0.5 g each)
Specific Gravity0.917
color White to light gray
OdorOdorless solid
Water Solubility Reacts

 

Lithium Aluminium Tetrahydride Uses

  1. Lithium Aluminium Tetrahydride is used as a reagent and reducing agent for the determination of carbonyl groups, as well as for the preparation of hydrides, silanes, boranes, etc.
  2. Lithium Aluminium Tetrahydride is used as a polymerization catalyst, reducing agent, jet fuel, and also in the synthesis of pharmaceuticals.purposes : a strong reducing agent.
  3. Lithium Aluminium Tetrahydride is mainly used as a reducing agent in medicine, spices, pesticides, dyes and fine organic synthesis.

Lithium Aluminium Tetrahydride Quenching Method

Lithium Aluminium Tetrahydride , the powder is very fine, wear a mask! Pay attention to the used weighing paper and steel spoon! After the reaction finishes adding solvent, the excess tetrahydroaluminum lithium is destroyed with methanol and washed with dilute hydrochloric acid, but it is emulsified, and many flocculent solids are difficult to filter out with diatomaceous earth, and the washing with dilute sodium bicarbonate is also emulsification.
1. A better method is to quench water at low temperature to generate colloidal particles, filter, and then wash with solvent several times, combine the organic phases, wash, dry and concentrate.
2. Quench with water at low temperature, then add a large amount of magnesium sulfate to form small particles, and it is much easier to filter. If the reaction is small, try it.
3. After the reaction is completed, metered water is added, then magnesium sulfate is added to dry, and suction filtration can be done!
4. It is best to quench with NaOH solution, and then filter to remove the solution. Assume that the amount of LiAlH4 in the reaction is 1 g. After the reaction was completed, the reaction mixture was cooled to -10~0°C, and 1 mL of water was slowly added dropwise with stirring to quench the reaction. After completion, 1 mL of 10% NaOH solution was slowly added dropwise. The resulting solid was filtered off, washed with the reaction solvent for several times, and the filtrate was concentrated under reduced pressure to obtain the product. If necessary, the solid can be soaked and washed with ethanol or methanol, and concentrated to recover more products (mostly containing inorganic salts at this time). Generally the solids are suspended in the reaction solvent and are very easy to filter. Sometimes in the process of adding water, the reactant is relatively viscous, and some reaction solvents can be appropriately added to dilute. Note: The reaction is violent when adding water, a lot of heat is generated and gas is generated, so it must be slowly added dropwise. The order of water and NaOH should not be reversed, otherwise it may increase the adsorption of the product and affect the yield.

Lithium Aluminium Tetrahydride-Related Reactions

Lithium Aluminium Tetrahydride is a complex hydride. Lithium aluminum hydride, abbreviated LAH, is a very important reducing agent in organic synthesis, especially for the reduction of esters, carboxylic acids and amides. Pure lithium aluminum hydride is a white crystalline solid, relatively stable below 120°C and in dry air, but explosively decomposes in contact with water.

When heating Lithium Aluminium Tetrahydride, the reaction mechanism is divided into 3 steps:
3 LiAlH4 → Li3AlH6 + 2 Al + 3 H2 (R1)
2 Li3AlH6 → 6 LiH + 2 Al + 3 H2 (R2)
2 LiH + 2 Al → 2 LiAl + H2 (R3)
R1 usually begins with the melting of Lithium Aluminium Tetrahydride in the temperature range of 150-170 °C, followed by immediate decomposition to Li3AlH6, but R1 proceeds below the melting point of LiAlH4. At about 200 °C, Li3AlH6 decomposes to LiH and Al(R2), followed by decomposition to LiAl(R3) above 400 °C. Reaction R1 is practically irreversible, while R3 is reversible, and the equilibrium pressure at 500°C is 25 kPa. In the presence of a suitable catalyst, the reaction of R1 and R2 can take place at ambient temperature.
Hydrolysis reaction
LiAlH4 reacts explosively and violently with water immediately and releases hydrogen:
LiAlH4 + 2H2O → LiAlO2 + 4H2
LiAlH4 + 4H2O → LiOH + Al(OH)3 + 4H2
Since the hydrogen evolution is quantitative, this reaction can be used to determine the content of lithium aluminum hydride in the sample.
This reaction provides a useful way to produce hydrogen in the laboratory. Samples that have been exposed to air for extended periods of time often turn whitish because the sample has absorbed enough moisture to produce a white mixture of lithium hydroxide and aluminum hydroxide.
Ammonolysis
The ether or tetrahydrofuran solution of LiAlH4 can react violently with ammonia to release hydrogen:
2LiAlH4 + 5NH3 → [LiAlH(NH2)2]2NH + 6H2
When the amount of ammonia is insufficient, the following reactions occur:
LiAlH4 + 4NH3 → LiAl(NH2)4 + 2H2
When the ratio of NH3/LiAlH4 is smaller, all three hydrogens in ammonia can be replaced:
LiAlH4 + NH3 → Li[Al(NH2)4]
Lithium Aluminium Tetrahydride can reduce many organic compounds, and its diethyl ether or tetrahydrofuran solution is commonly used in practice. The reducing power of Lithium Aluminium Tetrahydride is more powerful than the related sodium borohydride because the Al-H bond is weaker than the B-H bond. Due to the inconvenience of storage and use, bis(2-methoxyethoxy) sodium aluminum hydride (red aluminum), a derivative of Lithium Aluminium Tetrahydride, is commonly used in industry as a reducing agent, but hydride is still used in small-scale industrial production. Aluminum lithium.

Company Profile and Corporate Culture

Company Profile:

ZhiShang Chemical is owned by ZhiShang Group is a professional new-type chemicals enterprise combined into research and development, production and sales .

The company’s competitive product is pharmaceutical raw materials and intermediates (especially carbohydrate derivatives Series), In recent years, the company has made a major breakthrough in food and feed additives, plant extraction, industrial chemicals industry .

The company insists on the spirit of “sincere management, strict quality control, customer as god” , get consistent high praise from customers at home and abroad.

Corporate Culture:

OUR MISSION
Help China Chemicals to benefit the happiness of human life
OUR VISSION
Become the most trusted chemical supplier in the world
OUR BUSINESS PHILOSOPHY
Striver – oriented, enrich employees, customer first, deep service, seek development
OUR VALUES
Be prepared for danger in times of peace, forge ahead actively, unity and cooperation, and be brave to fight

About Us

The production base is located in Zhangqiu chemical industry park and Tai’an high-tech chemical industry park. laboratory and workshop in strict accordance with the GMP standard and the product fit national ISO9001 and ISO2000 standards.

“Zhishang” products are exported to Europe, North and South America, the Middle East, Asia Pacific and Africa area, so as to establish a long-term and stable cooperation relationship with customer in the world.

Company Info
  • Business Type: Manufacturer
  • Product Range: Additive , Chemical Auxiliary & Catalyst , Organic Chemicals
  • Products/Service: Organic Intermediate,Inorganic Chemistry, APIs, Dyestuffs And Pigments, Fragrance And Spices, Food Additives
  • Total Employees: 51~100
  • Capital (Million US $): 10000000RMB
  • Year Established: 2016
Production Capacity
  • No. of Production Lines : 8
  • No. of QC Staff : 5 -10 People
  • OEM Services Provided : yes
  • Factory Size (Sq.meters) : 3,000-5,000 square meters
  • Certificate: ISO9001 , CE , GMP , API , MSDS
  • Factory Location : Diao Town Industry Park, Zhangqiu City, Jinan City, Shandong Province, China.

Service

Pre-Sales Service

* Prompt reply and 24 hours online, professional team to provide best price and high quality product.

* Sample testing support.

* Every batch of products will be tested to ensureits quality.

*The packing also can be according the customers` requirment.

*Any inquiries will be replied within 24 hours.

*we provide Commerical Invoice, Packing List, Bill of loading, COA , Health certificate and Origin certificate. If your markets have any special requirements, let us know.

 

After-Sales Service

*The fact of logistics information monitoring.

* Any questions about the product can be consulted at any time.

*Product has any problem can return.

FAQ

Do you accept sample order?

We will make samples before mass production, and after sample approved, we’ll begin mass production. Doing 100% inspection during production, then do random inspection before packing.

 

HOW TO CONFIRM THE PRODUCT QUALITY BEFORE PLACING ORDERS?

You can get free samples for some products,you only need to pay the shipping cost or arrange a courier to us and take the samples. You can send us your product specifications and requests,we will manufacture the products according to your requests.

What’s your MOQ?

Our MOQ is 1kg. But usually we accept less quantity such as 100g on the condition that sample charge is 100% paid.

Do you supply product report?

Yes. We’ll give you product analysis report before shipping.

  Is there a discount?

Different quantity has different discount.

Shipping

1. ≤50kg, Express delivery recommended, usually called as DDU service;

2. ≤500kg, Air shipping recommended, usually called as FOB, CFR, or CIF service;

3. >500kg, sea shipping recommended, usually called as FOB, CFR, or CIF service;

4. For high value products, please select air shipping and express delivery for safe.

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