Ammonium bromide Chemical Properties

Melting point:

452 °C (lit.)

Boiling point:

396 °C/1 atm (lit.)

Density 

2.43 g/mL at 25 °C (lit.)

vapor pressure 

1 mm Hg ( 198.3 °C)

storage temp. 

Inert atmosphere,Room Temperature

solubility 

H₂O: 1 M at 20 °C, clear, colorless

form 

Powder/Solid

pka

-1.03±0.70(Predicted)

Specific Gravity

2.429

color 

White

PH

5.0-6.0 (25℃, 50mg/mL in H2O)

PH Range

4.5 - 6.0

Odor

Odorless

Water Solubility 

97 g/100 mL (25 ºC)

Sensitive 

Hygroscopic

Merck 

14,505

Dielectric constant

7.2（0.0℃）

Stability:

Stable. Incompatible with acids, bromine trifluoride, bromine trichloride, most common metals.

LogP

-1 at 25℃

CAS DataBase Reference

12124-97-9(CAS DataBase Reference)

NIST Chemistry Reference

Ammonium bromide(12124-97-9)

EPA Substance Registry System

Ammonium bromide (12124-97-9)

Safety Information

Hazard Codes 

Xn,Xi

Risk Statements 

22-36/37/38-36

Safety Statements 

22-24/25

WGK Germany 

2

RTECS 

BO9155000

TSCA 

Yes

HS Code 

28275900

Hazardous Substances Data

12124-97-9(Hazardous Substances Data)

Toxicity

LD50 orally in Rabbit: 2714 mg/kg

MSDS

• Language:English Provider:Ammonium bromide
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Ammonium bromide Usage And Synthesis

Description

Ammonium bromide is soluble in water and alcohol and is not particularly hazardous under normal conditions.

Chemical Properties

Ammonium bromide is a weak acid with a pKa of approximately 5 in water. It is an acid salt because the ammonium ion hydrolyzes slightly in water.
NH4Br(s) → NH⁺₄(aq) + Br^-(aq)
It decomposes to ammonia and hydrogen bromide when heated at elevated temperatures.

Physical properties

Colorless rhombic crystal; odor of ammonia; sublimes at 60°C; very soluble in cold water; decomposes in hot water; slightly soluble in alcohol; insoluble in acetone.

Uses

manufacture of photographic films, plates, and papers; in process engraving and lithography; fireproofing of wood; in corrosion inhibitors.

Uses

Ammonium bromide is a colorless crystals used for its bromide ion, it was also used as a halide in collodion formulas and as a restrainer in alkaline developers.

Preparation

Ammonium bromide can be prepared by the direct action of hydrogen bromide on ammonia. NH3 + HBr → NH4Br

Definition

ChEBI: An ammonium salt composed of ammonium and bromide ions in a 1:1 ratio.

General Description

White odorless crystals or granules that become yellow upon exposure to air. Sinks and mixes in water.

Air & Water Reactions

Water soluble

Reactivity Profile

Bromine trifluoride reacts explosively with the following Ammonium bromide, ammonium chloride, ammonium iodide [Mellor 2 Supp. 1:165 1956].

Health Hazard

INHALATION: Dust irritating - disturbed behavior, sedation. EYES: Slight irritation. SKIN: Slight irritation only with repeated or prolonged contact. INGESTION: Weakness, nervousness, anorexia, confusion, hallucinations, drowsiness, irritability, ataxia, vertigo, skin rash.

Fire Hazard

Special Hazards of Combustion Products: Material decomposes into N 2 and HBr or Br 2 under extreme temperatures.

Flammability and Explosibility

Non flammable

Purification Methods

It crystallises from 95% EtOH and is slightly hygroscopic.

Ammonium bromide(12124-97-9)Related Product Information

• Ammonium sulfate
• Ammonium chloride
• Ammonium citrate tribasic
• Tetraoctylammonium bromide
• Molybdic acid
• Ammonium acetate
• Tetraethylammonium bromide
• Ammonium hydroxide
• Tetrabutylammonium bromide
• Tetramethylammonium bromide
• Benzyltriethylammonium bromide
• Sodium bromide
• SODIUM NITRITE-15N
• LEAD(II) BROMIDE
• Lithium bromide
• NICKEL BROMATE
• Potassium bromide
• Benzyl bromide