Sodium bromide

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Template:Chembox E numberTemplate:Chembox SolubilityInWater
Sodium bromide
IUPAC name Sodium bromide
Identifiers
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Properties
NaBr
Molar mass 102.894 g/mol
Appearance White powder
Density 3.21 g/cm³, solid
Melting point
Boiling point
Hazards
EU classification {{{value}}}
R-phrases R36, R37, R38.
S-phrases S26, S37, S39.
Flash point {{{value}}}
Related compounds
Other anions {{{value}}}
Other cations {{{value}}}
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 reactions

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 applications

NaBr is sold under the brand name Sedoneural.

Safety

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.

References


External links

de:Natriumbromid hu:Nátrium-bromid


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