Lithium chloride

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White Hygroscopic crystals. Lithium chloride is one of the most hygroscopic salts known. In a closed environment, a saturated solution of lithium chloride will form an equilibrium at a relative humidity of about 12.4% (20C). Lithium chloride salts are also used in pyrotechnics to produce red colors, as a Desiccant, as a soldering Flux, and as a carbon dioxide stabilizer in carbonate drinks.

Synonyms and Related Terms

lithium salt of hydrochloric acid


  • Ingestion of excess amounts may cause an electrolyte imbalance and impaired renal function.
  • Noncombustible.
  • Skin and eye contact may cause irritation.
  • ThermoFisher: SDS

Physical and Chemical Properties

Soluble in water, ethanol, acetone, amyl alcohol and pyridine.

Deliquescent point at 20C is 12.4 % RH (see Saturated salt solutions)

Composition LiCl
CAS 7447-41-8
Melting Point 613 C
Density 2.07 g/ml
Molecular Weight mol. wt. = 42.4
Refractive Index 1.662
Boiling Point 1307 C

Resources and Citations

  • Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
  • The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983
  • CRC Handbook of Chemistry and Physics, Robert Weast (ed.), CRC Press, Boca Raton, Florida, v. 61, 1980 Comment: ref. index=1.662