LiBr - Lithium Bromide

What is Lithium Bromide?

Lithium bromide is a chemical compound with the formula LiBr. It is soluble in water, alcohol and ether. It is prepared by the action of hydrobromic acid on lithium hydroxide. It has been utilized in small scale for catalytic dehydrohalogenation for the synthesis of olefins. Aqueous solutions of lithium bromide have usually low watervaopour pressures. Concentrated aqueous solutions of lithium bromide can dissolve significant quantities of polar organic substances such as cellulose.

Other names – Lithium monobromide


Lithium Bromide


3.46 g/cm³

Molecular Weight/ Molar Mass

86.845 g/mol

Boiling Point

1,265 °C

Melting Point

552 °C

Chemical Formula


Lithium Bromide Structure – LiBr

Lithium Bromide Structure

Physical Properties of Lithium Bromide – LiBr


No odour


White to pinkish granular powder

Covalently-Bonded Unit


Heavy Atom Count





Soluble in methanol, ether, ethanol, acetone

Chemical Properties of Lithium Bromide – LiBr

  • Lithium bromide on reacting with chlorine, chlorine replaces bromine and lithium chloride is formed. This is a single displacement reaction.
  • Cl2 + 2LiBr → Br2 + 2LiCl

  • Lithium bromide reacts with silver nitrate forms lithium nitrate and silver bromide. The chemical equation is given below.
  • LiBr + AgNO3 → LiNO3 + AgBr

Uses of Lithium Bromide – LiBr

  • Used as a coolant in industrial air cooling systems working by absorptions.
  • Used in pharmaceuticals as a drying agent and for other industrial purposes.
  • Used as a sedative and for the treatment of epilepsy.
  • Used in the making of collodion dry plate emulsion due to its solubility in alcohol and ether.
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