7783-40-6[F-].[F-].[Mg+2]ORUIBWPALBXDOA-UHFFFAOYSA-LSellaite is a mineral with formula of MgF2. The IMA symbol is Sel.
7783-40-6CBI; Large Crystals
Colorless solid with mild violet fluorescence; [Merck Index] White solid that fluoresces under electric light; [Hawley] Off-white odorless chunks; [MSDSonline]
Safety information is for reference only and does not replace the supplier’s Safety Data Sheet (SDS), applicable regulations, or professional assessment.
This chemical does not meet GHS hazard criteria for 33.7% (168 of 498) of reports.
Warning
H315 (62.2%): Causes skin irritation [Warning Skin corrosion/irritation]
P261, P264, P264+P265, P271, P280, P302+P352, P304+P340, P305+P351+P338, P319, P321, P332+P317, P337+P317, P362+P364, P403+P233, P405, and P501 (click each P-code to see the statement)
Aggregated GHS information provided per 498 reports by companies from 16 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.
Chemical: Magnesium fluoride (MgF2)
Magnesium fluoride (MgF2) is listed on the EPA's Chemical Data Reporting (CDR) system. Manufacturers and importers of Magnesium fluoride (MgF2) are required to report information about their production and use of this chemical to the EPA under the Toxic Substances Control Act (TSCA). (40 eCFR Part 711)
REACH registered substance: Magnesium fluoride (EC: 231-995-1)
Magnesium fluoride (MgF2): Does not have an individual approval but may be used under an appropriate group standard
Used in ceramics, single crystal polarizing prisms, lenses, and windows; [Hawley] Used as a flux in metallurgy; Crystals are used in optical applications; Also used with graphite and fluorine to make ternary compounds with high electrical conductivity; [Ullmann]
Metal Preparation and Pouring [Category: Foundry]
Ceramics making [Category: Hobbies]
Paint and Coating Manufacturing
Magnesium fluoride (MgF2): ACTIVE
DescriptionMagnesium 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.
No reaction records under the current filter.
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Biological Exposure Indices (BEI) [ACGIH] - Fluorides in urine = 2 mg/L prior to shift or 3 mg/L at end of shift; (Repeated measurements recommended.)
1.0 [mg/m3], inhalable fraction, as F[German Research Foundation (DFG)]
5.4 [mg/m3]
59 [mg/m3]
350 [mg/m3]
UsesIn 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.
UsesSuitable 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.
UsesIn 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.
UsesMagnesium 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.
PreparationMagnesium 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
PreparationMagnesium 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.