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ChemicalBook >> CAS DataBase List >>Lithium fluoride

Lithium fluoride

Chemical Name:
Lithium fluoride
Lithium fluoride (LiF);LITHIUM FLUOIRDE;Lithium Flouride;lithium fluoride, puratronic;ntl50;NTL 50;tld100;tld700;TLD 100;TLD 700
Molecular Formula:
Molecular Weight:
MDL Number:
MOL File:
MSDS File:
Last updated:2023-11-21 15:52:03

Lithium fluoride Properties

Melting point 845 °C (lit.)
Boiling point 1681 °C
Density 2.64 g/mL at 25 °C (lit.)
vapor pressure 0Pa at 25℃
refractive index 1.3915
Flash point 1680°C
storage temp. Store at +5°C to +30°C.
solubility Soluble in 0.29 g/100 mL (20°C) and hydrogen fluoride. Insoluble in alcohol.
form random crystals
color White to off-white
Specific Gravity 2.635
PH 6.0-8.5 (25℃, 0.01M in H2O)
Water Solubility 0.29 g/100 mL (20 ºC)
Sensitive Hygroscopic
λmax λ: 260 nm Amax: ≤0.01
λ: 280 nm Amax: ≤0.01
Merck 14,5531
Solubility Product Constant (Ksp) pKsp: 2.74
Exposure limits ACGIH: TWA 2.5 mg/m3
NIOSH: IDLH 250 mg/m3; TWA 2.5 mg/m3
Stability Stable, but hygroscopic. Hydrolyzes in the presence of water to form hydrofluoric acid, which attacks glass - do not store in glass bottles. Incompatible with aqueous solutions, strong acids, strong oxidizing agents.
LogP 0.23 at 25℃
CAS DataBase Reference 7789-24-4(CAS DataBase Reference)
EWG's Food Scores 4
NIST Chemistry Reference Lithium fluoride(7789-24-4)
EPA Substance Registry System Lithium fluoride (7789-24-4)


Risk and Safety Statements

Symbol(GHS)  GHS hazard pictograms
Signal word  Danger
Hazard statements  H301-H315-H319-H335
Precautionary statements  P301+P310+P330-P302+P352-P305+P351+P338
Hazard Codes  T
Risk Statements  25-32-36/37/38-23/24/25
Safety Statements  22-26-36/37/39-45
RIDADR  UN 3288 6.1/PG 3
WGK Germany  2
RTECS  OJ6125000
Hazard Note  Toxic
HazardClass  6.1
PackingGroup  III
HS Code  28261900
Toxicity LD in guinea pigs (mg/kg): 200 orally, 2000 s.c. (Waldbott)
NFPA 704
2 0

Lithium fluoride price More Price(75)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 932310 Lithium fluoride 7789-24-4 5G $90 2023-06-20 Buy
Sigma-Aldrich 203645 Lithium fluoride powder, <100 μm, ≥99.98% trace metals basis 7789-24-4 5g $64.4 2023-06-20 Buy
Sigma-Aldrich 203645 Lithium fluoride powder, <100 μm, ≥99.98% trace metals basis 7789-24-4 25g $215 2023-06-20 Buy
Sigma-Aldrich 62497 Lithium fluoride BioUltra, ≥99.0% (F) 7789-24-4 500g $372 2022-05-15 Buy
Sigma-Aldrich 1.05686 Lithium fluoride 99.99 Suprapur? 7789-24-4 50g $413 2022-05-15 Buy
Product number Packaging Price Buy
932310 5G $90 Buy
203645 5g $64.4 Buy
203645 25g $215 Buy
62497 500g $372 Buy
1.05686 50g $413 Buy

Lithium fluoride Chemical Properties,Uses,Production


Lithium Fluoride (LiF) has the lowest refractive index of all common infrared materials. It possesses the highest UV transmission of any material, being able to transmit significantly into the VUV region at the hydrogen Lyman-alpha line (121nm). Lithium fluoride can be applied in rechargeable Li batteries, in radiation dosimeter for personnel monitoring as well as radiation research, as an optical material, as a heat sink material, to produce ceramics, and to dissolve fluid fuel for molten salt reactors.
lithium fluoride crystal
lithium fluoride crystal


Lithium Fluoride (LiF)  is a water insoluble Lithium source for use in oxygen-sensitive applications, such as metal production. It is most widely used as a flux in the production of ceramics, such as enamels, glasses and glazes. Similarly it is also used in brazing and welding fluxes and molten salt chemistry in metallurgy.
Lithium fluoride is also used for:

  1. X-Ray monochromator plates as an analysis crystal: Lithium fluoride is also used for X-ray monochromator plates where its lattice spacing makes it the most useful analysis crystal.
  2. Heat sink materials
  3. UV transmission windows: Lithium fluoride is the material with the most extreme UV transmission of all and is used for special UV optics. Lithium fluoride transmits well into the VUV region at the hydrogen Lyman-alpha line (121nm) and beyond.


[1] H. Li, G. Richter, J. Maier, Reversible Formation and Decomposition of LiF Clusters Using Transition Metal Fluorides as Precursors and Their Application in Rechargeable Li Batteries, Advanced Materials, 2003, vol. 15, 736-739
[2] J. R. Cameron, F. Daniels, N. Johnson, G. Kenney, Radiation Dosimeter Utilizing the Thermoluminescence of Lithium Fluoride, Science, 1961, vol. 134, 333-334
[3] E. T. Kvamme, J. C. Earthman, D. B. Leviton, B. J. Frey, Lithium fluoride material properties as applied on the NIRCam instrument, Proc. SPIE 59,4, 2005
[4] Y. Kogure, H. Kaburaki, Y. Hiki, Low-Temperature Thermal Properties of Lithium Fluoride Containing Dislocations, Phonon Scattering in Condensed Matter, 1979, 267-270
[5] H. Naghib-zadeh, C. Glizky, I. D?rfel, T. Rabe, Low temperature sintering of barium titanate ceramics assisted by addition of lithium fluoride-containing sintering additives, Journal of the European Ceramic Society, 2010, vol. 30, 81-86
[6] M. W. Rosenthal, P. R. Kasten, R. B. Briggs, Molten-Salt Reactors – History, Status, and Potential, 1970, vol. 8, 107-117


lithium fluoride is a strong irritant to the eyes and skin; potassium bromide is toxic by ingestion and inhalation; sodium chloride is table salt, a medical concern when ingested in excess, but certainly of no significant hazard to emergency responders.

Chemical Properties

Lithium fluoride is a white crystalline solid. It is not hygroscopic as are the other lithium halides and is not affected by exposure to the air. Lithium fluoride is the least soluble of the alkali metal fluorides. This characteristic likens it to the alkaline earth fluorides. Lithium fluoride is different from the other lithium halides in that it does not form hydrates which can be isolated from solution. Lithium fluoride does show an increase in solubility as hydrofluoric acid is added to an aqueous solution. Under these conditions the fluoride ion is converted to the bifluoride ion, HF-2, allowing further dissolving of the solid lithium fluoride.

Physical properties

White cubic crystals; refractive index 1.3915; density 2.635 g/cm3; melts at 845°C; vaporizes at 1,676°C; very slightly soluble in water 0.27 g/100g at 18°C; soluble in hydrofluoric acid; insoluble in alcohol.


The important uses of lithium fluoride are as flux in glasses, vitreous enamels and glazes; in soldering and welding aluminum; and its prisms in infrared spectrophotometers. The compound also is used for storing solar energy.


As flux for soldering and welding aluminum, in the manufacture of vitreous enamels and glazes. Lithium fluoride prisms are used in infrared spectrophotometers.


Lithium fluoride is widely used in many fields. It is used in the soldering progress for glass lining as a cosolvent. It finds application as an additive of aluminum electrolysis and rare earth electrolysis as a crystal in X-ray spectrometry. It is also used in specialized UV optics due to its large band gap and transparency to short wave length ultraviolet radiation. It is involved to record ionizing radiation exposure from gamma rays, beta particles and neutrons in thermoluminescent dosimeters. In nuclear reactors, lithium fluoride is mixed with beryllium fluoride to form a base solvent, which is used in molten-salt reactor experiment (MSRE). Additionally, it is useful as a coupling layer to enhance electron injection in polymer light-emitting diodes (PLED) and organic light-emitting diode (OLED).


Lithium fluoride is prepared by treating an aqueous solution of lithium hydroxide or lithium carbonate with aqueous hydrofluoric acid: LiOH + HF → LiF + H2O.

Flammability and Explosibility

Non flammable

Safety Profile

Poison by ingestion and subcutaneous routes. When heated to decomposition it emits toxic fumes of F-. Used as a flux in enamels, glasses, glazes, and weldmg. See also FLUORIDES and LITHIUM COMPOUNDS.

Purification Methods

Possible impurities are LiCO3, H2O and HF. These can be removed by calcining it at red heat, then pulverizing it with a Pt pestle and storing it in a paraffin bottle. Its solubility in H2O is 0.27% at 18o. It volatilises between 1100-1200o. [Kwasnik in Handbook of Preparative Inorganic Chemistry (Ed. Brauer) Academic Press Vol I p 235 1963].

Structure and conformation

The space lattice of LiF belongs to the cubic system, and its rock salt structure has a lattice constant of a=0.40173 nm and Li-F=0.201 nm. The cleavage plane is (100).

Lithium fluoride Preparation Products And Raw materials

Raw materials

Preparation Products

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View Lastest Price from Lithium fluoride manufacturers

Image Update time Product Price Min. Order Purity Supply Ability Manufacturer
LiF pictures 2023-12-07 LiF
US $0.00 / g 1g 99.99% 100KGS Zhejiang Free Trade Zone Violet Trade Co., Ltd.
Lithium Fluoride pictures 2023-07-25 Lithium Fluoride
US $50.00 / Kg/Bag 25KG 99%;99.95% 800tons/month Hebei Yanxi Chemical Co., Ltd.
Lithium fluoride pictures 2023-01-31 Lithium fluoride
US $27.00 / KG 1KG 99% 20tons Hebei Mojin Biotechnology Co., Ltd
  • LiF pictures
  • LiF
  • US $0.00 / g
  • 99.99%
  • Zhejiang Free Trade Zone Violet Trade Co., Ltd.
  • Lithium Fluoride pictures
  • Lithium Fluoride
  • US $50.00 / Kg/Bag
  • 99%;99.95%
  • Hebei Yanxi Chemical Co., Ltd.

Lithium fluoride Spectrum

um 99.99%Lithium fluoride LITHIUM FLUORIDELITHIUM FLUORIDELITHIUM FLUORIDELITHIUM FLUORIDE Fluorolithium Lithium fluoride (Li3F3) Lithium fluoride (LiF) Lithium fluorure Lithium monofluoride Lithiumfluorid lithiumfluoride(lif) lithiumfluorure lithiumfluorure(french) Lithium Fluoride, > 99.5% ultrapurenormatome Lithiumfluoride,ultradry,99.99%(metalsbasis) Lithiumfluoride,Puratronic,99.99%(metalsbasis) Lithiumfluoride,98+% Lithiumfluoride,99.98%(metalsbasis) Lithiumfluoride99.9 Lithium fluoride, extra pure, 99.98% Lithium fluoride, for analysis, 97% LITHIUM FLUOIRDE Lithiumfluoride,99.9%(99.9+%-Li) lithium fluoride, optical grade lithium fluoride, puratronic lithium fluoride, ultra dry LITHIUMFLUORIDE,POWDER,REAGENT Lithium fluoride 99.999% Lithium fluoride, Puratronic(R), 99.99% (metals basis) Lithium fluoride, Optical Grade, 99.5+% Lithium fluoride, 98.5% Lithium fluoride, 99.85% (metals basis) Lithium fluoride (a little fluorine) Lithium Flouride Lithium fluoride, 99.98%, extra pure LITHIUM FLUORIDE, 97%, FOR ANALYSIS Lithium fluoride, extra pure ithium fL lithiummonofluoride NTL 50 ntl50 TLD 100 TLD 700 tld100 tld700 Trilithium trifluoride LITHIUM FLUORIDE Lithium fluoride (99.9% Li) (fused crystals) Lithium Fluoride Anhydrous Lithiumfluoridefusedcrystalsmmpieces Lithiumfluoridewhitepowder Lithium Fluoride, Puratronic (Metals Basis) Lithium fluoride (99.9%-Li) Lithium fluoride fused (pieces) Lithium fluoride 99.99 Lithium fluoride 99 LITHIUM FLUORIDE PURE LITHIUM FLUORIDE, PRECIPITATED, 99.995% LITHIUM FLUORIDE, POWDER, <5 MICRONS,99.98+%
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