Magnesium fluoride
- CAS No.
- 7783-40-6
- Chemical Name:
- Magnesium fluoride
- Synonyms
- Aluminum chlorohydrate solution;afluon;irtran1;sellaite;Magnesium flux;magnesiumfluorure;Magnesium fluorid;MAGNESIUM FLUOIRDE;MAGNESIUM FLUORIDE;Magnesiumfluoride2
- CBNumber:
- CB8716701
- Molecular Formula:
- F2Mg
Lewis structure
- Molecular Weight:
- 62.3
- MDL Number:
- MFCD00011108
- MOL File:
- 7783-40-6.mol
- MSDS File:
- SDS
- TDS File:
- TDS
| Melting point | 1263 °C (lit.) | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Boiling point | 2227 °C/1 atm (lit.) | ||||||||||||||
| Density | 3.15 g/mL at 25 °C (lit.) | ||||||||||||||
| refractive index | 1.365 | ||||||||||||||
| Flash point | 12.00°C | ||||||||||||||
| form | random crystals | ||||||||||||||
| color | White to off-white | ||||||||||||||
| Specific Gravity | 3.15 | ||||||||||||||
| Water Solubility | 87 mg/L (18 ºC) | ||||||||||||||
| Specific Heat Capacity | Cp(crystal): 0.99 J/(g·K), at 25℃ | ||||||||||||||
| Crystal Structure | Tetragonal, Rutile | ||||||||||||||
| crystal system | square | ||||||||||||||
| Merck | 14,5665 | ||||||||||||||
| Solubility Product Constant (Ksp) | pKsp: 10.29 | ||||||||||||||
| Space group | P42/mnm | ||||||||||||||
| Lattice constant |
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| Exposure limits |
ACGIH: TWA 2.5 mg/m3 NIOSH: IDLH 250 mg/m3; TWA 2.5 mg/m3 |
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| Cosmetics Ingredients Functions |
ANTIPLAQUE ORAL CARE |
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| InChI | InChI=1S/2FH.Mg/h2*1H;/q;;+2/p-2 | ||||||||||||||
| InChIKey | ORUIBWPALBXDOA-UHFFFAOYSA-L | ||||||||||||||
| SMILES | [Mg](F)F | ||||||||||||||
| Hardness, Mohs | 5.5 | ||||||||||||||
| Knoop Microhardness | 500, kg/mm2 | ||||||||||||||
| Indirect Additives used in Food Contact Substances | MAGNESIUM FLUORIDE | ||||||||||||||
| FDA 21 CFR | 175.105 | ||||||||||||||
| CAS DataBase Reference | 7783-40-6(CAS DataBase Reference) | ||||||||||||||
| EWG's Food Scores | 1-2 | ||||||||||||||
| FDA UNII | 5N014C7IWU | ||||||||||||||
| EPA Substance Registry System | Magnesium fluoride (7783-40-6) | ||||||||||||||
| UNSPSC Code | 12352302 | ||||||||||||||
| NACRES | NA.23 |
SAFETY
Risk and Safety Statements
| Symbol(GHS) |  GHS07 |
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|---|---|---|---|---|---|---|---|---|---|---|
| Signal word | Warning | |||||||||
| Hazard statements | H335 | |||||||||
| Precautionary statements | P261-P271-P304+P340+P312-P403+P233-P405-P501 | |||||||||
| target organs | Respiratory system | |||||||||
| PPE | dust mask type N95 (US), Eyeshields, Gloves | |||||||||
| Hazard Codes | Xi | |||||||||
| Risk Statements | 36/37/38 | |||||||||
| Safety Statements | 26-36-37/39 | |||||||||
| WGK Germany | 3 | |||||||||
| RTECS | OM3325000 | |||||||||
| Hazard Note | Irritant | |||||||||
| TSCA | TSCA listed | |||||||||
| HS Code | 28261900 | |||||||||
| Storage Class | 13 - Non Combustible Solids | |||||||||
| Hazard Classifications | STOT SE 3 | |||||||||
| Toxicity | LD in guinea pigs (mg/kg): 1000 orally, 3000 s.c. (Waldbott) | |||||||||
| REACH Registrations | Active | |||||||||
| NFPA 704 |
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Magnesium fluoride price More Price(47)
| Manufacturer | Product number | Product description | CAS number | Packaging | Price | Updated | Buy |
|---|---|---|---|---|---|---|---|
| Sigma-Aldrich | 343188 | Magnesium fluoride pieces, 3-6 mm, 99.9% trace metals basis (excluding Na) | 7783-40-6 | 25g | $100 | 2026-04-30 | Buy |
| Sigma-Aldrich | GF09947885 | Magnesium fluoride lump, 5?mm max. lump size, weight 20?g, purity 99.99% | 7783-40-6 | 1EA | $413 | 2024-03-01 | Buy |
| Sigma-Aldrich | GF66491051 | Magnesium fluoride lump, 5?mm max. lump size, weight 50?g, purity 99.99% | 7783-40-6 | 1EA | $617 | 2023-06-20 | Buy |
| Strem Chemicals | 93-1226 | Magnesium fluoride (99.99+%-Mg) PURATREM (99.99+%-Mg) | 7783-40-6 | 25g | $183 | 2026-04-30 | Buy |
| Strem Chemicals | 93-1226 | Magnesium fluoride (99.99+%-Mg) PURATREM (99.99+%-Mg) | 7783-40-6 | 100g | $549 | 2026-04-30 | Buy |
Magnesium fluoride Chemical Properties, Uses, Production
Description
Magnesium fluoride is a by-product of the manufacture of metallic beryllium and uranium. It is a fine white crystalline powder with low chemical reactivity.
Magnesium fluoride is used as flux in magnesium metallurgy and in the ceramics industry. Magnesium fluoride may be used for the extraction of aluminum from arc-furnace alloys with Fe, Si, Ti, and C. Optical windows of highly purified magnesium fluoride which transmit light from the vacuum ultraviolet (140 nm) into the infrared (7) are recommended for use as ultraviolet optical components for the use in space exploration. Magnesium fluoride is can be also used as an antireflection coating material having a good antireflection effect and a low refractive index.
Uses
In Mg metallurgy and in the ceramics industry, Magnesium fluoride is used as a flux. Single crystals of alkaline-earth fluorides, such as Magnesium fluoride, are suitable for optical applications because of their large domain of transparency from the ultraviolet to the middle infrared region. Infrared transparent windows may be prepared by hot-pressing Magnesium fluoride powder.
Ternary intercalation compounds of graphite with fluorine and Magnesium fluoride have been prepared; these compounds have high electrical conductivity and would therefore have an important potential as cathodes or new electroconductive materials. Finally, the eutectic NaF–MgF2 has been proposed in advanced latent-heat energy storage for solar power systems.
Preparation
Magnesium fluoride is prepared by treating a magnesium salt solution with hydrofluoric acid or sodium fluoride:
MgSO4 + 2HF → MgF2 + 2H+ + SO42–
or by adding hydrofluoric acid to magnesium carbonate:
MgCO3 + 2HF → MgF2 + CO2 + H2O
References
[1] John R. Papcun, Fluorine Compounds, Inorganic, Magnesium, Kirk- Othmer Encyclopedia of Chemical Technology, 2000
[2] H. Tanaka, M. Kobayashi, T. Sakakibara, Method of producing magnesium fluoride coating, antireflection coating, and optical element, Patent, 2013
Chemical Properties
Magnesium fluoride (MgF₂) is a white crystalline salt that exhibits faint purple fluorescence under ultraviolet light. It is soluble in nitric acid and sparingly soluble in water and ethanol. It is used in the electrolysis of aluminum ore to produce metallic aluminum and also as a reflective coating on various types of optical components. It is a tetragonal, birefringent crystal with the TiO2 type of structure.
Characteristics
Magnesium fluoride (MgF₂) is a tetragonal crystal with a rutile-type structure, having lattice parameters of a = 4.64 Å and c = 3.06 Å. Its point group is 4/mmm, and its space group is P4₂/mnm. When exposed to ultraviolet radiation or electron-beam excitation, it exhibits faint purple fluorescence. MgF₂ crystals possess excellent optical and polarising properties, making them particularly suitable for ultraviolet and infrared spectroscopy. They are transparent over a broad wavelength range (110 nm–7.5 μm) and are therefore widely used in space telescope optics. Single crystals are also employed in vacuum-ultraviolet-transparent windows, polarising prisms, and optical lenses.
Magnesium fluoride thin films exhibit a low refractive index (n ≈ 1.38), a broad transmission range (120–8,000 nm), a wide bandgap (≈11 eV), excellent thermal stability, high mechanical strength, and a high laser-induced damage threshold. These properties make MgF₂ an important material for the fabrication of anti-reflective coatings, high-reflectivity coatings, and high-damage-threshold optical coatings. Consequently, MgF₂ thin films are widely used in a variety of optical coating applications.
Uses
Magnesium fluoride (MgF2) is used to polarize corrective lenses of eyeglasses to reduce the glare of sunlight by selecting the orientation of the light waves passing through the lenses. MgF2 is also used to polarize windows, sunglasses, and similar optical items.
Uses
Suitable for vacuum deposition. Magnesium fluoride occurs in nature as the mineral, sellaite. It is used in
glass and ceramics. Single crystals are used for polarizing prisms and lenses.
Uses
In the ceramics and glass industry.Magnesium Fluoride is a durable crystal with low absorption, suitable for high-powered laser, space, and other UV applications. MgF2 is also naturally birefringent, making it an ideal material for use where this property can be exploited, such as retardation plates and polarizing elements, particularly in the wavelength range from 0.13-0.30 µm.
Preparation
Magnesium fluoride is a colorless salt with the rutile structure. It is formed by reaction of magnesium oxide and HF or magnesium carbonate and NH4F·HF. It is also a by product from the manufacture of elements such as beryllium by reduction of the corresponding fluoride by magnesium metal.
Hazard
Strong irritant. TLV: 2.5 mg(F)/m3.
Safety Profile
Moderately toxic by ingestion. When heated to decomposition it emits toxic fumes of F-. See also MAGNESIUM and FLUORIDES.
Magnesium fluoride Preparation Products And Raw materials
| Supplier | Tel | Country | ProdList | Advantage | |
|---|---|---|---|---|---|
| WUHAN GEEYESCHEM CHEMICAL CO., LTD. | 15927657268 | 1916972268@qq.com | China | 2182 | 58 |
| Wuhan Ji Ye Sheng Chemical Co., Ltd. | 15387013945 | 1806989108@qq.com | China | 2163 | 58 |
| Wuhan Jiyesheng Chemical Co., Ltd | 15307169873 | 1218603465@qq.com | China | 2158 | 58 |
| wuhan geeyeschem chemical | 027-1537705-6467 15377056467 | 3410849474@qq.com | China | 2018 | 58 |
| Shanghai bike new material technology co., LTD | 021-34790086 17317635738 | 17317635738@163.com | China | 496 | 58 |
| BROFOS NANOTECHNOLOGY(NINGBO)CO ,LTD. | 0574-62615397 17757424292 | brofosnano@foxmail.com | China | 206 | 58 |
| Tianjin Jinhui Taiya Chemical Reagent Co., Ltd | 022-59582624 18622766592 | 2163746375@qq.com | China | 271 | 58 |
| J & K SCIENTIFIC LTD. | 18210857532 18210857532 | jkinfo@jkchemical.com | China | 96815 | 76 |
| Alfa Aesar | 400-6106006 | saleschina@alfa-asia.com | China | 30103 | 84 |
| Beijing HwrkChemical Technology Co., Ltd | 89508211 18501085097 | sales.bj@hwrkchemical.com | China | 9407 | 55 |
View Latest Price from Magnesium fluoride manufacturers
| Image | Update time | Product | Price | Min. Order | Purity | Supply Ability | Manufacturer | |
|---|---|---|---|---|---|---|---|---|
 |
2026-09-14 | Magnesium fluoride
7783-40-6
|
1kg | 98% | 80 T/Month | Hebei Qujie Technology Co., Ltd. | ||
 |
2026-09-14 | Magnesium Fluoride（MgF2）
7783-40-6
|
1KG | 99.995% | 20 T | Shanghai Sheeny Metal Materials Co.,Ltd | ||
 |
2026-05-28 | Magnesium fluoride
7783-40-6
|
$2.00-5.00 | 1KG | 99% | 10000kg | Hebei Chuanghai Biotechnology Co,.LTD |
-
- Magnesium fluoride
7783-40-6
- 98%
- Hebei Qujie Technology Co., Ltd.
-
- Magnesium Fluoride（MgF2）
7783-40-6
- 99.995%
- Shanghai Sheeny Metal Materials Co.,Ltd
-
- Magnesium fluoride
7783-40-6
- $2.00-5.00
- 99%
- Hebei Chuanghai Biotechnology Co,.LTD
