CAS Number: 16919-19-0
Molecular Weight: 178.15
EC Number: 240-968-3
MDL number: MFCD00010887
PubChem Substance ID: 24852255
IUPAC Name: diazanium;hexafluorosilicon(2-)
Ammonium fluorosilicate is used as:
-in etching glass,
Ammonium fluorosilicate finds use as a disinfectant, and it is useful in etching glass, metal casting, and electroplating.
Ammonium fluorosilicate is also used to help neutralize washing machine water as laundry sour.
Resin finishing catalyst in textile and printing and dyeing industries,coating,fluorating agent and chemical reagent,flux of non-ferrous metal.
Ammonium fluorosilicate is Used as an insecticide, miticide, mothproofing agent, wood preservative, and disinfectant (brewing industry).
Ammonium fluorosilicate is Also used in soldering flux, laundry sours, glass etching, light metal casting, electroplating, and dental prophylaxis.
Ammonium fluorosilicate is Used as Chemical intermediate.
Ammonium fluorosilicate is Used For research and industrial use.
Ammonium Fluorosilicate is used as a disinfectant, and it is useful in etching glass, metal casting, and electroplating.
Ammonium fluorosilicate (also known as ammonium hexafluorosilicate, ammonium fluosilicate or ammonium silicofluoride) has the formula (NH4)2SiF6.
Ammonium fluorosilicate is a toxic chemical, like all salts of fluorosilicic acid.
Ammonium fluorosilicate is made of white crystals, which have at least three polymorphs and appears in nature as rare minerals cryptohalite or bararite.
Ammonium fluorosilicate is A white crystalline solid.
Ammonium fluorosilicate is Noncombustible.
Ammonium fluorosilicate is Corrodes aluminum.
Ammonium Fluorosilicate, CAS 16919-19-0, (also known as ammonium hexafluorosilicate, ammonium fluosilicate or ammonium silicofluoride) has the formula (NH4)2SiF6.
Ammonium Fluorosilicate is a toxic chemical, like all salts of fluorosilicic acid.
Ammonium fluorosilicate finds use as a catalyst additive in low grade fuel refining, as a disinfectant, and Ammonium Fluorosilicate is useful in etching glass, metal casting, and electroplating.
Ammonium fluorosilicate is also used to help neutralize washing machine water as a laundry sour.
Ammonium fluorosilicate is generally immediately available in most volumes.
High purity, submicron and nanopowder forms may be considered.
American Elements produces to many standard grades when applicable, including Mil Spec (military grade); ACS, Reagent and Technical Grade; Food, Agricultural and Pharmaceutical Grade; Optical Grade, USP and EP/BP (European Pharmacopoeia/British Pharmacopoeia) and follows applicable ASTM testing standards.
Typical and custom packaging is available.
Additional technical, research and safety (MSDS) information is available as is a Reference Calculator for converting relevant units of measurement.
Ammonium fluorosilicate is registered under the REACH Regulation and is manufactured in and / or imported to the European Economic Area, at ≥ 10 to < 100 tonnes per annum.
Ammonium fluorosilicate is used in articles, in formulation or re-packing, at industrial sites and in manufacturing.
White or colorless crystal,transparent and right angle prism if anhydrous and without sharp end ,not corrosive to glass if absolutely dry,freely soluble in water and slightly in alcohol,melting point:384 deg Celcius.
Ammonium fluorosilicate is White odorless crystalline solid.
Ammonium fluorosilicate's Yellow or pink color shade is available.
Ammonium fluorosilicate is Soluble in water. Noncombustible.
Ammonium fluorosilicate is Toxic.
Ammonium Fluorosilicate is a fine, white, odorless, crystalline salt containing no water of crystalllization.
Ammonium fluorosilicate has three major polymorphs: α-(NH4)2[SiF6] form is cubic (space group Fm3m, No. 225) and corresponds to the mineral cryptohalite.
The β form is trigonal (scalenohedral) and occurs in nature as mineral bararite.
A third (γ) form was discovered in 2001 and identified with the hexagonal 6mm symmetry.
In all three configurations, the [SiF6]2− octahedra are arranged in layers.
In the α form, these layers are perpendicular to  directions.
In the β- and γ- forms, the layers are perpendicular to the c-axis.
The silicon atoms of α-(NH4)2[SiF6] (alpha), have cubic close packing (CCP).
The γ form has hexagonal close packing and the β-(NH4)2[SiF6] has primitive hexagonal packing.
In all three phases, 12 fluorine atoms neighbor the (NH4)+.
Although bararite was claimed to be metastable at room temperature, it does not appear one polymorph has ever turned into another.
Still, bararite is fragile enough that grinding it for spectroscopy will produce a little cryptohalite.
Even so, ammonium fluorosilicate assumes a trigonal form at pressures of 0.2 to 0.3 GPa.
The reaction is irreversible.
If it is not bararite, the phase is at least very closely related.
The hydrogen bonding in (NH4)2[SiF6] allows this salt to change phases in ways that normal salts cannot.
Interactions between cations and anions are especially important in how ammonium salts change phase.
Ammonium fluorosilicate makes rare appearances in nature.
Ammonium fluorosilicate is found as a sublimation product of fumaroles and coal fires.
As a mineral, Ammonium fluorosilicate is either called cryptohalite or bararite, the two being two polymorphs of the compound.
Chemical properties and health hazards
Ammonium fluorosilicate is noncombustible, but Ammonium fluorosilicate will still release dangerous fumes in a fire, including hydrogen fluoride, silicon tetrafluoride, and nitrogen oxides.
Ammonium fluorosilicate will corrode aluminium.
In water, ammonium fluorosilicate dissolves to form an acid solution.
Inhaling dust can lead to pulmonary irritation, possibly death.
Ingestion may also prove fatal.
Irritation of the eyes comes from contact with the dust, as well as irritation or ulceration of the skin.
Physical state: solid (powder, crystalline)
-caswell no. 043,
-ammonium silicon fluoride,
-fluorosilicic acid, ammonium salt
-silicate(2-), hexafluoro-, ammonium (1:2)
-silicate(2-), hexafluoro-, diammonium