Ammonium Bromide, Formula, Preparation Method, Chemical Properties

Ammonium Bromide

Ammonium bromide is a chemical compound that has the odourless white granules and has a saline taste. It is derived from the hydrobromic acid. It is easily soluble in water. It converts the bromide to bromine when it exposure gradually on the air.  The systematic IUPAC name is known as ammonium bromide. The chemical or molecular formula of ammonium bromide is  NH4Br.

Structural Formula

This is the structural formula of the ammonium bromide:

Ammonium Bromide

Chemical Formula

The chemical formula of the ammonium bromide is NH4Br.

Preparation Method

The ammonium bromide is prepared by the ammonia is reacting with the hydrogen bromide. The chemical reaction is as follows.

NH3 + HBr → NH4Br

The another method to produce the ammonium bromide is ammonia reacting with the iron bromide which is passing on the aqueous solution.

2NH3 + FeBr2 + 2H2O                     2NH4Br + Fe(OH)2

Physical Properties

Melting point 235C
Boiling point 452C
Molecular weight 97.943g/mol
Density 2.429g/cm3
Solubility in water 60.6g/100mL
Refractive index 1.712
Crystal structure Isometric
Magnetic susceptibility -47.0×10-6cm3/mol
Appearance White powder hygroscopic
Learn More:   Acetonitrile, Formula, Preparation Method, Chemical Properties

Chemical Properties

The melting and boiling point of the ammonium bromide is balanced at room temperatures. The magnetic susceptibility has been very low. It is isometric in structure. It is insoluble in alcohols. It has a low density and low molecular weight. It is less hazardous to the environment.


Ammonium bromide is used for photography . It’s also used for waterproofing wood. Ammonium bromide is used as a corrosive inhibitor. It used  for photography for clearance of photo.


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