Ammonium Bromide

TCC’s Ammonium Bromide, NH4Br, is the ammonium salt of hydrobromic acid. The chemical crystallizes into colorless prisms, possessing a saline taste. It sublimes on heating and is easily soluble in water. On exposure to air it gradually assumes a yellow color because of the oxidation of traces of bromide (Br–) to bromine (Br2). Ammonium bromide is used for photography in films, plates and papers; in fireproofing of wood; in lithography and process engraving; in corrosion inhibitors; and in pharmaceutical preparations.

Applications

TCC’s Ammonium Bromide is used for photography in films, plates and papers; in fireproofing of wood; in lithography and process engraving; in corrosion inhibitors; and in pharmaceutical preparations. Ammonium Bromide used in combination with an appropriate oxidizer is an efficient biocide, applied in various industrial water systems and waste water, to control bacteria, fungi and algae.

Specifications

Ammonium Bromide Spec TCC – Click Here To Download

Shipping

TCC’s Ammonium Bromide is available for shipping throughout the continental United States with one (1) week lead-time. Please call (401) 360-2800 for details. Ammonium bromide is available in 1MT net supersacks and 25kg bags. Special packaging is available on request.

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Description

TCC’s Ammonium Bromide is the ammonium salt of hydrobromic acid. The chemical formula is NH4Br. The chemical crystallizes into colorless prisms, possessing a saline taste; it sublimes on heating and is easily soluble in water. On exposure to air ammonium bromide gradually assumes a yellow color because of the oxidation of traces of bromide (Br) to bromine (Br2).

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

NH3 + HBr → NH4Br

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.

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

Ammonium bromide is a weak acid with a pH of ~5 in water. It is an acid salt because the ammonium ion hydrolyzes slightly in water.

Ammonium bromide decomposes to ammonia and hydrogen bromide when heated to elevated temperatures:

NH4Br → NH3 + HBr

Publication author

offline 4 days

Ben Sawicki

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