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Magnesium Hexaflurosilicate is a crystalline solid.
Decomposes at 120 °C.
Contact may cause slight irritation to skin, eyes, and mucous membranes.
CAS: 16949-65-8
MF: F6MgSi
MW: 166.38
EINECS: 241-022-2
Synonyms
fluosilicicacidmagnesiumsalt;hexafluorosilicate(2-)magnesium(1:1);hexafluoro-silicate(2-magnesium(1:1);magnesiumhexafluorosilicate(2-);magnesiumsilicofluoride(mgsif6);Silicate(2-),hexafluoro-,magnesium(1:1);siliconfluoridemagnesiumsalt;MAGNESIUM SILICOFLUORIDE
Magnesium Hexaflurosilicate is a white crystallinesolid. Molecular weight= 274.52. Hazard Identification(based on NFPA-704 M Rating System): Health 3,Flammability 0, Reactivity 0. Soluble in water.
Magnesium Hexaflurosilicate, CAS 16949-65-8, (also known as magnesium hexafluorosilicate, magnesium fluosilicate or magnesium silicofluoride) has the formula MgSiF6.
Magnesium Hexaflurosilicate is a toxic chemical, like all salts of fluorosilicic acid.
Magnesium fluorosilicate finds use as an additive in metal finishing, stone floor finishing, and a variety of other specialized applications.
Magnesium Hexaflurosilicate Chemical Properties
Melting point: 120°C
Boiling point: >120°C
density: 1.788
vapor pressure: 0.001Pa at 25℃
form: Powder
Specific Gravity: 1.788
Water Solubility: 498.4g/L at 18.3℃
Hydrolytic Sensitivity 2: reacts with aqueous acid
Cosmetics Ingredients Functions: ANTIPLAQUE ORAL CARE
InChI: InChI=1S/F6Si.Mg.6H2O/c1-7(2,3,4,5)6;;;;;;;/h;;6*1H2/q-2;+2;;;;;;
InChIKey: ZYDDCPHMRLLEEV-UHFFFAOYSA-N
LogP: 0 at 25℃
CAS DataBase Reference: 16949-65-8(CAS DataBase Reference)
EPA Substance Registry System: Magnesium Hexaflurosilicate (16949-65-8)
Colorless or white rhombus or needle-shaped crystals.
Odorless.
Soluble in water and dilute acid, poorly soluble in hydrofluoric acid, and insoluble in alcohol.
Uses
1. Cement Concrete Curing and Strengthening Agent
Magnesium Hexaflurosilicate is an excellent curing agent for cement and other products.
Domestic and international regulations stipulate that 1-5% Magnesium Hexaflurosilicate should be added to cement as a hardener.
Magnesium Hexaflurosilicate not only improves the cracking and erosion resistance of cement but also increases its flexural strength.
Furthermore, Magnesium Hexaflurosilicate can be used as an antifreeze agent for concrete surface treatment and effectively improves the thermal insulation properties of mixed cement.
2. Cement Performance Improver
Magnesium Hexaflurosilicate mainly improves the performance of cement concrete in two ways: solving white spots on the surface of cement products and improving white spots and corrosion in painted cement products.
The specific solution is to add 0.1-0.3% (by weight) of Magnesium Hexaflurosilicate additive at the construction site.
Experiments show that cement containing the improver has a Ca(OH)2 content of less than 0.1%, an alkalinity only one-quarter that of naturally set cement, and good wind and corrosion resistance.
3. Other Material Additives
This additive can also be applied to foamed resin products.
Because conventionally functional foamed resin products are generally not heat-resistant, flammable, and have poor chemical resistance, their synthesis is greatly limited.
To overcome this limitation, some foreign companies have successfully developed foamed resins with excellent fire resistance, thermal conductivity, and various mechanical properties by adding a mixed solution of sodium silicate to the synthesized product, followed by drying and then treating with a Magnesium Hexaflurosilicate solution.
4. Wood Preservatives
Magnesium Hexaflurosilicate is generally used as a wood preservative abroad.
Generally, applying Magnesium Hexaflurosilicate to Lauan plywood produces five-layer plywood with excellent mildew resistance.
Furthermore, mixing Magnesium Hexaflurosilicate with pentachlorobenzene provides even better corrosion and mildew resistance.
Simultaneously, the addition of silica compounds significantly improves the strength, stiffness, and insulation properties of the raw material.
5. Other Uses
In addition to its wide application in cement, synthetic wood panels, and resin foam, Magnesium Hexaflurosilicate can also be added as an additive to toothpaste and mouthwash to improve and prevent the formation of dental plaque; Magnesium Hexaflurosilicate can also be used in the ceramics industry, glass industry, and agriculture.
Health Hazard
Highly toxic, may be fatal if inhaled, swallowed or absorbed through skin.
Avoid any skin contact.
Effects of contact or inhalation may be delayed.
Fire may produce irritating, corrosive and/or toxic gases.
Runoff from fire control or dilution water may be corrosive and/or toxic and cause pollution.
Reactivity Profile
Magnesium Hexaflurosilicate gives basic aqueous solutions.
Reacts with acids.
Does not usually react as either oxidizing agents or reducing agents.
