Lithium bromide

Lithium bromide

Chembox new
ImageFile = Lithium-bromide-3D-ionic.png IUPACName = Lithium bromide
Section1 = Chembox Identifiers
CASOther = 7550-35-8
PubChem = 82050
EINECS = 231-439-8
Section2 = Chembox Properties
Formula = LiBr (anhydrous)
LiBr•2H2O (dihydrate)
MolarMass = 86.845(3) gmol-1
Appearance = White solid
Density = 3.464 gcm-3
MeltingPt = 552 °C
BoilingPt = 1265 °C
Solubility = 177 g/100 ml (20°C) (dihydrate)
Section3 = Chembox Hazards
MainHazards =
FlashPt =
Autoignition =

Lithium bromide, or LiBr, is a chemical compound of lithium and bromine. Its extreme hygroscopic character makes LiBr useful as a desiccant in certain air conditioning systems.Ulrich Wietelmann, Richard J. Bauer "Lithium and Lithium Compounds" in Ullmann's Encyclopedia of Industrial Chemistry 2005, Wiley-VCH: Weinheim.]

Production and properties

LiBr is prepared by treatment of lithium carbonate with hydrobromic acid. The salt forms several crystalline hydrates, unlike the other alkali metal bromides. [Holleman, A. F.; Wiberg, E. "Inorganic Chemistry" Academic Press: San Diego, 2001. ISBN 0-12-352651-5.] The anhydrous salt forms cubic crystals similar to salt

Uses

Lithium bromide is used in air-conditioning systems as desiccant. Otherwise the salt is useful as a reagent in organic synthesis. For example it reversibly forms adducts with some pharmaceuticals.

Medical applications

Lithium bromide was used as a sedative beginning in the early 1900s, but it fell into disfavor in the 1940s when some heart patients died after using it as a salt substitute. [ [http://www.webmd.com/content/Article/87/99356.htm?pagenumber=1 Bipolar disorder] ] Like lithium carbonate and lithium chloride it was used as treatment for Bipolar disorder.

Hazards

Lithium salts are psychoactive and somewhat corrosive. Dosages for lithium carbonate are ca. 200 mg/day.

References

External links

*


Wikimedia Foundation. 2010.

Игры ⚽ Поможем решить контрольную работу

Look at other dictionaries:

  • lithium bromide — noun the lithium salt of hydrobromic acid, LiBr, sometimes used as a desiccant …   Wiktionary

  • lithium bromide — Chemical commonly used as the absorbent in absorption cooling system. Water would then be the refrigerant …   Dictionary of automotive terms

  • Lithium — (pronEng|ˈlɪθiəm) is a chemical element with the symbol Li and atomic number 3. It is a soft alkali metal with a silver white color. Under standard conditions, it is the lightest metal and the least dense solid element. Like all alkali metals,… …   Wikipedia

  • Bromide — A bromide ion is a bromine atom with charge of −1.Compounds with bromine in formal oxidation state −1 are called bromides, and each individual chemical in this class can be called a bromide, as well. The class name can include ionic compounds… …   Wikipedia

  • lithium — /lith ee euhm/, n. 1. Chem. a soft, silver white metallic element, the lightest of all metals, occurring combined in certain minerals. Symbol: Li; at. wt.: 6.939; at. no.: 3; sp. gr.: 0.53 at 20°C. 2. Pharm. the substance in its carbonate or… …   Universalium

  • Lithium chloride — Chembox new Name = Lithium chloride ImageFile1 = Lithium chloride.jpg ImageSize1 = 150px ImageName1 = Lithium chloride ImageFile2 = Lithium chloride 3D ionic.png ImageSize2 = 150px ImageName2 = Lithium chloride IUPACName = Lithium Chloride… …   Wikipedia

  • Lithium fluoride — Chembox new Name = Lithium fluoride ImageFile1 = LiF crystal.jPeG ImageSize1 = 120px ImageName1 = Lithium fluoride boule ImageFile2 = Lithium fluoride 3D ionic.png ImageSize2 = 120px ImageName2 = Lithium fluoride IUPACName = Lithium fluoride… …   Wikipedia

  • Lithium iodide — Chembox new Name = Lithium Iodide ImageFile = Lithium iodide 3D ionic.png ImageName = Lithium iodide OtherNames = lithium(I) iodide Section1 = Chembox Identifiers CASNo = 10377 51 2 Section2 = Chembox Properties Formula = LiI MolarMass = 133.845… …   Wikipedia

  • Lithium molybdate — Chembox new Name = Lithium molybdate ImageFile = Lithium molybdate.jpg ImageName = Lithium molybdate OtherNames = Section1 = Chembox Identifiers CASNo = 13568 40 6 Section2 = Chembox Properties Formula = Li2MoO4 MolarMass = 173.82 g/mol… …   Wikipedia

  • lithium — An element of the alkali metal group, atomic no. 3, atomic wt. 6.941. Many of its salts have clinical applications. [Mod. L. fr. G. lithos, a stone] l. bromide LiBr; a white deliquescent …   Medical dictionary

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”