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Acetyl bromide

Acetyl bromide CAS 506-96-7

CAS:506-96-7 | C2H3BrO |MW:122.95 | EINECS NO:208-061-7

Payment: L/C,T/T,D/P,Paypal,Money Gram,Western Union

Incoterm: FOB,CFR,CIF,EXW,FCA,CPT,CIP

Transporta: Ocean, Land,Air, DHL,TNT

Port: Shanghai Port, Qingdao Port

Description

As an important organic halide, acetyl bromide is a transparent, colorless liquid that smokes at room pressure and temperature. The smoking effect is caused by its strong hydrolysis reaction, which produces a white mist of hydrogen chloride. Yellowing is usually an indication of partial decomposition, or impurities. The release of hydrogen and its own vapors gives acetyl bromide a pungent and suffocating odor. Steam can have a strong irritant, corrosive, and toxic effect on mucous membranes in the nasal cavity, respiratory tract, and eyes. Acetyl Bromide has a density that is 1.66 g/cm3, which is much higher than the density of water. It will sink quickly to the bottom and react. Acetyl Bromide is volatile at room temperature and has a low boiling point. Acetyl Bromide is an organic molecule that is both polar and ionizable. It hydrolyzes immediately upon contact with water to produce acetic and hydrogen bromide. This releases a lot of heat.

Product Images & Packaging

Acetyl bromide
Acetyl bromide
Acetyl bromide

Product Parameters

Acetyl bromide Chemical Properties
Melting point -96 °C
Boiling point 75-77 °C(lit.)
density 1.663 g/mL at 25 °C(lit.)
vapor density 4.3 (vs air)
vapor pressure 92.2 mm Hg ( 25 °C)
refractive index n20/D 1.45(lit.)
Fp >230 °F
storage temp. Store at <= 20°C.
solubility Miscible with ether, chloroform, benzene and acetone.
form Fuming Liquid
color Clear colorless to dark yellow
OdorAcrid and sharp.
Water Solubility REACTS
Sensitive Moisture Sensitive

The application of Acetyl bromide

1.As an acetylation core reagent

The acetyl group of Acetyl Bromide molecules is susceptible to nucleophilic attack due to the strong electron-withdrawing effect of the bromine atoms. This makes it easy for the acetyl atoms in the target molecule.

Acetyl Bromide reacts rapidly with alcohols and phenols in order to produce the corresponding acetic ester, while hydrogen bromide is released as a by-product, which promotes the reaction. This reaction is important in the synthesis and intermediates of complex natural products. It is also used to introduce acetyl group as a protective group for hydroxyl groups.

 

Acetylation amines: Reacts fatty or aromatic amino acids to produce acetamide compounds in high yields. Acetamide structures can be found in many drug molecules and functional materials. This reaction is a simple way to create these skeletons.

The double role of the Friedel Crafts reaction: Acetyl Bromamide is able to act not only as an acylation reagent but can also be used under Lewis acid catalysis to convert aromatic hydrocarbons in aromatic ketones;

It is also unique in that it can be combined with carboxylic acid to produce more mixed anhydrides on site, which improves reaction rate and yield. This method is especially effective when using carboxylic acid with high steric hinderance or aromatic ring system with low reactivity.

 

2.As a bromination activator and reagent

Acetyl Bromide’s bromine atom is also highly reactive, which allows it to be used as a source of bromine or to trigger bromination reactions in certain conditions.

Acetyl Bromide, in the presence of catalytic amounts of red phosphorus can replace the hydrogen at the alpha positions of carboxylic acids with a bromine, generating alpha-bromo acid. This product is used to synthesize alpha amino acids and alpha hydroxy acid, as well as carbon chain elongation. It is also widely used in the production of drugs and bioactive molecules.

 

Acetyl Bromide can react to form more reactive acyl-bromides or mixed-anhydrides. This activation technique greatly enhances the subsequent esterification or amidation reactions. It is especially useful in complex systems, such as macrolide and peptide syntheses, that require high selectivity and are difficult to perform under conventional conditions. It is a way to turn inert carboxylic acid into a highly reactive acylation agent.

 

3. Special Applications in Materials Science & Functional Molecular Synthesis

Acetyl Bromide is selected for its high reaction rate in the preparation high-value functional materials.

Monomer synthesis: Used to precisely construct liquid crystal intermediates with specific length alkoxy chain or polar groups. Acetylation and bromination reactions with Acetyl Bromide can regulate the rigidity and dielectric constants of molecules, leading to liquid crystal materials that have specific phase transition temperatures.

 

Chemical modification of materials: polymers with hydroxyl and amino side chains can be modified chemically to give them new properties. Examples include polyvinyl, polyacrylamide, cellulose derivatives. The hydrophilicity of a polymer, its biocompatibility or reaction sites can be adjusted by adding acetyl groups, or triggering additional bromination reactions.

Acetyl bromide 's Procurement Guide

Procurement Guidelines
1. Sample Policy
We can provide a 2-3g free trial package (shipping fee required)

2. Batch procurement
Packaging: 25kg/bag; 220kg/barrel; Special packaging according to your needs
MOQ:1kg

3. Customized services
Concentration customization (90% -99%)
Paeonol’s outsourcing services

Paeonol

FAQ

Yes, we have our own factory called ” ZhiShang Industry Group “

Yes, we have GMP certificate for some products, and we can provide DMF as well.

 -Quality you require, eg. Assay, Purity, or single impurity

-Quantity you need

-Standard you want, such as USP, EP, JP etc.

Escrow and T/T in advance are highly recommended. We can accept Western Union, Money Gram and Paypal as well.

For sample(less than 1kg), in about 3 working days after payment; for larger orders (more than 1kg), in about 7 working days after payment. 

For samples, we will send by TNT/DHL/FEDEX/UPS express, usually it takes about 3-5 day.

Related References

Manufacturer of Acetyl bromide

Company Info

Zhishang Bio company in China that exports chemicals, Cosmetic raw materials, and Intermediates for over 70 countries now.
 
And a range of 50,000 products with the best quality and competitive price to meet your different purchasing needs.
 
The company integrates research and development, production, and trade, with a modern production base, advanced testing equipment, and an experienced technical team to ensure that products reach industry-leading levels in purity, stability, and environmental friendliness.

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