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Sodium bromide

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Sodium bromide
Sodium bromide Sodium-bromide-3D-ionic
General
Systematic name Sodium bromide
Other names
Molecular formula NaBr
Molar mass 102.894 g/mol
Appearance White powder
CAS number [7647-15-6]
Properties
Density and phase 3.21 g/cm³, solid
Solubility in water 73.3 g/100 mL (20 °C)
116.0 g/100 mL (50 °C)
Other solvents ethanol, acetone
Melting point 755 °C
Boiling point 1390 °C
Hazards
MSDS External MSDS
EU classification mild irritant (I)
R-phrases R36

, Template:R37, R38 .

S-phrases S26

, S37 , S39 .

NFPA 704 N/A
Flash point Non-flammable.
Supplementary data page
Structure and
properties
n, εr, etc.
Thermodynamic
data
Phase behavior
Solid, liquid, gas
Spectral data UV, IR, NMR, MS
Related compounds
Other anions NaCl
Other cations KBr
Except where noted otherwise, data are given for
materials in their standard state (at 25 °C, 100 kPa)
Infobox disclaimer and references

Sodium bromide is a salt with the formula NaBr, widely used as an anticonvulsant and a sedative in the late 19th and early 20th centuries. Its action is due to the bromide ion (potassium bromide is equally effective). It is a high-melting white, crystalline solid that resembles sodium chloride. It is a widely used source of the bromide ion.

Principal chemical reactionsEdit

NaBr is widely used in organic synthesis as a nucleophile to convert organochlorine compounds to organobromine derivatives, which are more usefully (selectively) reactive.

NaBr + RCl → RBr + NaCl
  • Sodium bromide can be used as a source of the chemical element bromine. This can be accomplished by bubbling chlorine gas through an aqueous solution of NaBr.
  • As a source of HBr, NaBr is treated with a strong, non-volatile acid:
NaBr + H3PO4 → HBr + NaH2PO4

HBr can also be oxidized to Br2 using MnO2 or concentrated H2SO4.

Other applicationsEdit

NaBr is sold under the brand name Sedoneural.

SafetyEdit

NaBr is harmful if swallowed or inhaled in large amounts, affecting the central nervous system, brain, and eyes (see potassium bromide). The compound causes irritation to the skin, eyes and respiratory system.

External linksEdit

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