Aluminum bromide, likewise known through its common name aluminum tribromide and also IUPAC name tribromoalumane, is a hygroscopic compound stood for by the chemistry formula AlBr3 <1, 4>. That is dimeric kind (Al2Br6) exists greatly in the solid step <2>.

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Aluminum Bromide Identification

CAS Number7727-15-3 <1>
PubChem CID24409 <1>
ChemSpider ID22818 <3>
UN Number1725 <1>
NSC Number87608 <1>
EC Number231-779-7 <1, 4>
RTECS NumberBD0350000 <4>


Aluminum Bromide Formula

How is Aluminum Bromide Prepared

It is synthesized by the slow addition of piece of aluminum foil to liquid bromine, and also this direct bromination is stood for by the adhering to reaction <5>:

2Al + 3Br2 → 2AlBr3

The equation is extremely exothermic and also causes the aluminum foil to melt, creating heat and also light <5>.


Aluminum Bromide Synthesis

Reaction through Chlorine

When aluminum bromide reacts with chlorine, it undergoes solitary replacement to yield aluminum chloride and also bromine, i m sorry is shown by the following well balanced equation:

2AlBr3+ 3Cl2 → 2AlCl3 + 3Br2

Properties and Characteristics of Aluminum Bromide

General Properties

Molar Mass/Molecular Weight266.69 g/mol <1, 4>

Physical Properties

Color and also AppearanceWhite come pale yellowish-red, lumpy powder (anhydrous form) <1, 4>
OdorPungent <1>
Melting Point97.5 °C, 207.5 °F (anhydrous) <1>
Boiling Point255 °C, 491 °F (anhydrous) <1>
Density3.2 g cm-3 <1, 4>
State of issue at room temperatureSolid <1, 4>
SolubilitySoluble in benzene, toluene, nitrobenzene, ether, methyl alcohol, and also acetone <1>
Solubility in WaterHighly soluble, partly hydrolyzes displayed by a fuming solution and appearance of white precipitate
Heat capacity (C)100.6 J/(mol.K)
Lattice consistent (a, b, and also c)0.7512 nm, 0.7091 nm, and also 1.0289 nm

Atomic Properties

Crystal StructureMonoclinic lattice <6>


Aluminum (III) Bromide crystal Structure

What is It offered for

Although the does not have actually any far-ranging commercial applications, that is anhydrous type works together a catalyst for boosting the rate of Friedel-Crafts alkylation reaction <7, 8>.

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Is Aluminum Bromide Toxic

Exposure with inhalation and also swallowing can cause acute toxicity <8>. Call with skin and also eyes can an outcome in irritation, corrosion, and also damage <8>.