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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. On exposure to air it gradually assumes a yellow color because of the oxidation of traces of bromide (Br−) to bromine (Br2).

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Further Information

Names

IUPAC nameAmmonium bromide

Identifiers

CAS Number: 12124-97-9

JSmol: Interactive image

ChEBI: CHEBI:85364

ChemSpider: 23804

ECHA InfoCard: 100.031.973

EC Number: 235-183-8

PubChem: 25514

RTECS number: BO9155000liugoiugiu

UNII: R0JB3224WS

Properties

Chemical formula: NHBr

Molar mass: 97.94 g/mol

Appearance: hygroscopic

Density: 2.429 g/cm

Melting point: 235 °C (455 °F; 508 K)

Boiling point: 452 °C (846 °F; 725 K)

Solubility in water: 60.6 g/100 mL (0 °C)
78.3 g/100 mL (25 °C)
145 g/100 mL (100 °C)

Magnetic susceptibility: -47.0·10 cm/mol−63

Refractive index: 1.712

Structure

Crystal structure: Isometric

Hazards

GHS pictograms:

GHS signal word: Warning

GHS hazard statements: H315 H319 H335

GHS precautionary statements: P261 P264 P271 P280 P302+352 P304+340 P305+351+338 P312 P321 P332+313 P337+313 P362 P403+233 P405 P501

NFPA 704:

Related compounds

anions: Ammonium fluoride

cations: Sodium bromide

Except where otherwise noted, data are given for materials in their(at 25 °C [77 °F], 100 kPa).Except where otherwise noted, data are given for materials in their(at 25 °C [77 °F], 100 kPa).