Lithium fluoride (LiF)
Lithium fluoride
CAS: 7789-24-4
Molecular Formula: FLi
Lithium fluoride (LiF) - Names and Identifiers
| Name | Lithium fluoride |
| Synonyms | LT-E001 Fluorolithium Lithiumfluorid Lithium fluorure Lithium fluoride Lithium monofluoride Lithium fluoride (LiF) Lithium fluoride (Li3F3) Lithium Fluoride Anhydrous Lithiumfluoridewhitepowder Lithiumfluoridefusedcrystalsmmpieces LITHIUM FLUORIDELITHIUM FLUORIDELITHIUM FLUORIDELITHIUM FLUORIDE |
| CAS | 7789-24-4 |
| EINECS | 232-152-0 |
| InChI | InChI=1/FH.Li/h1H;/q;+1/p-1 |
| InChIKey | PQXKHYXIUOZZFA-UHFFFAOYSA-M |
Lithium fluoride (LiF) - Physico-chemical Properties
| Molecular Formula | FLi |
| Molar Mass | 25.94 |
| Density | 2.64 g/mL at 25 °C (lit.) |
| Melting Point | 845 °C (lit.) |
| Boling Point | 1681 °C |
| Flash Point | 1680°C |
| Water Solubility | 0.29 g/100 mL (20 ºC) |
| Solubility | Soluble in 0.29 g/100 mL (20°C) and hydrogen fluoride. Insoluble in alcohol. |
| Vapor Presure | 0Pa at 25℃ |
| Appearance | random crystals |
| Specific Gravity | 2.635 |
| Color | White to off-white |
| Exposure Limit | ACGIH: TWA 2.5 mg/m3NIOSH: IDLH 250 mg/m3; TWA 2.5 mg/m3 |
| Solubility Product Constant(Ksp) | pKsp: 2.74 |
| Maximum wavelength(λmax) | ['λ: 260 nm Amax: ≤0.01', , 'λ: 280 nm Amax: ≤0.01'] |
| Merck | 14,5531 |
| PH | 6.0-8.5 (25℃, 0.01M in H2O) |
| Storage Condition | Store at +5°C to +30°C. |
| Stability | Stable, but hygroscopic. Hydrolyzes in the presence of water to form hydrofluoric acid, which attacks glass - don't store in glass bottles. Incompatible with aqueous solutions, strong acids, oxide |
| Sensitive | Hygroscopic |
| Refractive Index | 1.3915 |
| Physical and Chemical Properties | Lithium fluoride is white powder, sodium chloride type crystal structure. Relative density 2.640, melting point 848 ℃, boiling point 1673 ℃. At 1100~1200 degrees began to volatilize, the vapor is alkaline. Lithium fluoride is slightly soluble in water and insoluble in alcohol and other organic solvents. At room temperature, Lithium fluoride is soluble in nitric acid and sulfuric acid, but insoluble in hydrochloric acid, with hydrofluoric acid Li2HF acid salt formation. |
| Use | Used as additives for aluminum electrolysis and rare earth electrolysis, optical glass manufacturing, desiccant, flux, etc |
Lithium fluoride (LiF) - Risk and Safety
| Hazard Symbols | T - Toxic |
| Risk Codes | R25 - Toxic if swallowed R32 - Contact with acids liberates very toxic gas R36/37/38 - Irritating to eyes, respiratory system and skin. R23/24/25 - Toxic by inhalation, in contact with skin and if swallowed. |
| Safety Description | S22 - Do not breathe dust. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) |
| UN IDs | UN 3288 6.1/PG 3 |
| WGK Germany | 2 |
| RTECS | OJ6125000 |
| FLUKA BRAND F CODES | 10-21 |
| TSCA | Yes |
| HS Code | 28261900 |
| Hazard Note | Toxic |
| Hazard Class | 6.1 |
| Packing Group | III |
| Toxicity | LD in guinea pigs (mg/kg): 200 orally, 2000 s.c. (Waldbott) |
Lithium fluoride (LiF) - Upstream Downstream Industry
| Raw Materials | Hydrofluoric Acid |
Lithium fluoride (LiF) - Nature
Open Data Verified Data
White cubic crystal. d20 2.640, melting point 848 ℃, boiling point 1681 ℃. Evaporation was carried out at 1100-1200 °c. Slightly soluble in water. The solubility in water is 0. 13g/lOOmL at 25 °c. Insoluble in ethanol and other organic solvents, can be dissolved in hydrofluoric acid to generate lithium hydrogen fluoride (LiHF2). It cannot burn itself. By high heat decomposition of toxic gases.
Last Update：2024-01-02 23:10:35
Lithium fluoride (LiF) - Preparation Method
Open Data Verified Data
lithium carbonate or lithium hydroxide reacts with hydrofluoric acid and evaporates to dryness in a platinum or lead dish.
Last Update：2022-01-01 09:06:31
Lithium fluoride (LiF) - Use
Open Data Verified Data
as an electrolyte component in the electrolytic aluminum industry, it can improve the conductivity and current efficiency; It is used as a neutron shielding material in the atomic energy industry and as a solvent in a molten salt reactor; it is used as a transparent window for ultraviolet rays in optical materials. High purity lithium fluoride can also be used in the production of lithium fluoride glass, the production of Spectrometer and X-ray monochromator prism.
Last Update：2022-01-01 09:06:32
Lithium fluoride (LiF) - Safety
Open Data Verified Data
irritating. Poisoning by inhalation, ingestion, or percutaneous absorption. Large doses can cause vertigo, collapse. Damage to the kidneys.
Last Update：2022-01-01 09:06:32
Lithium fluoride (LiF) - Reference Information
| LogP | 0.23 at 25℃ |
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| solubility in water (g/100ml) | grams dissolved per 100ml of water: 0.16g/20 ℃ |
| toxicity | This product is toxic inorganic. Hazard number 83018. |
| Application | lithium fluoride can be widely used as a cosolvent in glass, copper, aluminum welding process and salt melting chemical process; it is also recommended as a heat carrier for the storage of solar radiation in aerospace technology; It can also be used in the electrolysis and metallurgical industries of aluminum. High purity lithium fluoride is used to make fluorinated glass, and can also be used to make the prism of Spectrometer and X-ray monochromator. Raw materials for lithium ion batteries. used as desiccant and flux, also used in the manufacture of optical glass used as additives for aluminum electrolysis and rare earth electrolysis, optical glass manufacturing, desiccant, flux and so on photoelectric material research for insulating material coating, electrode modification layer. battery grade lithium fluoride is one of the key raw materials for the production of lithium hexafluorophosphate, a commonly used electrolyte for lithium ion batteries. Prisms used in the manufacture of spectrometers and X-ray monochromators are used as carriers for proliferation reactions. |
| production method | There are two methods: neutralization method and double decomposition method. Industrial production using the neutralization method. The neutralization method is to prepare lithium fluoride by reacting lithium carbonate or lithium hydroxide with hydrofluoric acid. Li2CO3 2HF = 2LiF CO2 H2O the solid lithium carbonate was added to the hydrogen fluoride solution to react and precipitate LiF crystals, which were filtered and dried to obtain the product. |
| category | toxic substances |
| toxicity grade | high toxicity |
| Acute toxicity | oral-rat LD50: 143 mg/kg |
| flammability hazard characteristics | non-combustible; Toxic smoke containing lithium oxide and fluoride generated in the fire scene; |
| storage and transportation characteristics | warehouse ventilation and low-temperature drying; Separate from food storage and transportation |
| extinguishing agent | water, sand |
| Occupational Standard | TLV-TWA 2.5 mg (fluorine)/m3; Tel 5 mg (fluorine)/M3 |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-10 22:29:15
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Raw Materials for Lithium fluoride (LiF)