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Sodium bromide

Properties, data and information sources.

 

Contents

Sodium bromide is an inorganic chemical compound from the group of bromides; it is the sodium salt of hydrogen bromide.

 

Names and Identifiers

Name
Sodium bromide
Formula
BrNa
NaBr
Molar mass
102.894 (g/mol)
CAS registry number
7647-15-6
EC number EINECS
231-599-9
InChI Key
JHJLBTNAGRQEKS-UHFFFAOYSA-M

 

Chemical formulas

Molecular formula and structural formula of Sodium bromide:

 

BrNa or NaBr

Mr = 102.8938 g/mol
SMILES: [Na+].[Br-]

 

Data and Properties

Pure sodium bromide exists as a white, crystalline, hygroscopic solid. NaBr crystallizes above 50.7°C in the anhydrous form described here; below this temperature it crystallizes as sodium bromide dihydrate.

solubility:
+ Soluble in water (905 g/L at 20 °C), ethanol (25 g/L at 25 °C), methanol (149 g/L at 25 °C).
- Unsoluble in acetone, acetonitrile.
melting point
747 °C
boiling point
1390 °C
flash point
800 °C
density
3.200 g cm-3 at 25 °C

2.342 g cm-3 at 747 °C
standard enthalpy of formation
-361.41 kJ/mol [s. 25 °C ]
standard entropie
86.82 J/(mol K) at 25 °C
Gibbs free energy
-349.3 kJ/mol
heat capacity
51.4 J/(mol K)
permittivity
ε = 6.44 (25°C)
(dielectric constant)
magnetic susceptibility χ
-41.0 × 10-6 cm3 mol-1
crystal structure:
Cubic crystal system of the NaCl type, space group Fm3m No. 225, lattice constant a = 597 pm.

 

Percentage and isotopic composition:

Mass-related elemental composition and isotope proportions of the compound Sodium bromide - BrNa - calculated based on molecular mass.

Symbol
Element ENumber x
of atoms ExData of the element
and isotopes *Percentages
of isotopesPercentage of
Ex in formula massBr
Bromine1ΣAr = 79.904 u
81Br: 80.9169 u [49,35 %]
79Br: 78.91834 u [50,65 %] 
81Br: 38.32363 %
79Br: 39.33316 %
77.6568 %Na
Sodium1ΣAr = 22.98976928 u
22Na: 21.99444 u [<< 1 %]
23Na: 22.98977 u [100 %]
24Na: 23.99096 u [<< 1 %] 
22Na: trace
23Na: 22.34321 %
24Na: trace
22.3432 %

*) The third column lists the atomic masses or isotope masses of the elements involved and - in square brackets - the natural isotope composition.

 

More calculated data

The molar mass is M = 102.89376928 grams per mole.

The amount of substance in one kilogram of the substance is n = 9.719 mol.

The amount of substance in one gram of the substance is n = 0.01 mol.

Monoisotopic mass: 101.90810688 Da - related to 79Br23Na.

 

Hazard warnings according to GHS

(General information without guarantee of accuracy and completeness! The information does not replace the chemical safety data sheet or a risk assessment, but rather provides a general overview of the risk posed by the hazardous substance.

Signal word: Danger

GHS hazard statements (H phrases):


H361
Suspected of damaging fertility or the unborn child

H360
May damage fertility or the unborn child

H373
May cause damage to organs through prolonged or repeated exposure

LD50 (rat, oral): 3500 mg/kg.

Labeling in the EU: See ECHA Substance Infocard 100.028.727.

For toxicology and occupational safety when handling Sodium bromide as well as measures to be taken in case of danger, see: Hazardous Substances Information System GESTIS, ZVG-Nr. 002900.

 

External Sources

PubChem:ID 253881ChemSpider:ID 22712UNII of the FDA (USA):Unique Ingredient Identifier LC1V549NOMEPA CompTox Chemicals Dashboard:DTXSID3034903Other CAS RN:59217-63-9 (also used, outdated or deleted registration numbers)

 

Manufacturers and Sources of Supply

The table below lists producers and suppliers of Sodium bromide as a commercial chemical for laboratories, research, industry and production with the corresponding contact details.

 

Literature Sources

[0] - Specialist and research articles in scientific journals via PubMed: Sodium_bromide.

 

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Last update: 2026-01-23

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