Ammonium Bromide

Ammonium Bromide NH4Br is the ammonium salt of hydrobromic acid the chemical crystallizes in colorless prisms, possessing a saline taste, it sublimes on heating and is easily soluble in water.

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Ammonium bromide can be prepared by direct action of hydrogen bromide on ammonia.

It can also be prepared by the reaction of ammonia with iron (II) bromide or iron (III) bromide which may be obtained by passing aqueous bromine solution over iron filings.

Ammonium bromide is strong electrolyte when put in water ammonium bromide decomposes to ammonia and hydrogen bromide when heated at elevated temperatures.

On exposure to the air, it slowly assumes a color because of the oxidation of traces of the bromide (Br) to the bromine (Br2) and the color assumed by this is yellow.