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Sodium bromide
Sodium bromide
Sodium bromide
IUPAC name
Identifiers
CAS number 7647-15-6 Yes check.svgY,
13466-08-5 (dihydrate)
PubChem 253881
RTECS number VZ3150000
Properties
Molecular formula NaBr
Molar mass 102.894 g/mol
Appearance White powder
Density 3.21 g/cm3 (anhydrous)
2.18 g/cm3 (dihydrate)
Melting point

747 °C (anhydrous)
36 °C (dihydrate)

Boiling point

1396 °C

Solubility in water 73.3 g/100 mL (20 °C)
116.0 g/100 mL (50 °C)
Solubility in methanol 16.7 g/100mL
Refractive index (nD) 1.6459
Hazards
MSDS External MSDS
EU Index Not listed
Flash point 800 °C
LD50 3500 mg/kg
Related compounds
Other anions Sodium fluoride
Sodium chloride
Sodium iodide
Other cations Lithium bromide
Potassium bromide
Rubidium bromide
Caesium bromide
 Yes check.svgY (what is this?)  (verify)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Sodium bromide, also known as sedoneural[1] 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).[2] It is a high-melting white, crystalline solid that resembles sodium chloride. It is a widely used source of the bromide ion.

Contents

Principal chemical reactions

NaBr is used in organic synthesis as a source of the bromide nucleophile to convert alkyl chlorides to more reactive alkyl bromides by the Finkelstein reaction.

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

Safety

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

References

  1. ^ Sodium Bromide
  2. ^ Bromide

External links

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Simple English

File:Sodium
Sodium bromide

Sodium bromide is a chemical compound. Its chemical formula is NaBr. It is made of sodium and bromide ions.

Contents

Properties

Sodium bromide is a white solid. It dissolves easily in water. When it is heated very strongly in air, it makes bromine gas. It also reacts with chlorine to make liquid bromine.

Preparation

It is made by reacting hydrogen bromide with sodium hydroxide. It can be made by mixing sodium and bromine, although this reaction is very violent.

Uses

It was used in medicine as a hypnotic and sedative. Potassium bromide is also used for this purpose. It is used to make other bromine compounds that are organic. It was used to make silver bromide. It can be used as a disinfectant with chlorine in pools. It can be used to make dense fluids for drilling oil wells.

Safety

Sodium bromide is only toxic in large amounts, like sodium chloride.

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