Ammonium hexafluorosilicate

Ammonium hexafluorosilicate Basic information
Product Name:Ammonium hexafluorosilicate
Synonyms:Cryptophthalite;Ammonium hexafluorosilicate, min. 98%;Ammonium hexafluorosilicate,98%;Ammonium hexafluorosilicate, Puratronic (metals basis);Ammonium hexafluorosilicate ,99.99%;Ammomium fluosilicat;AMMoniuM hexafluorosilicate, (trace Metal basis);AMMoniuM hexafluorosilicate, 99.999%, (trace Metal basis)
CAS:16919-19-0
MF:F6H8N2Si
MW:178.15
EINECS:240-968-3
Product Categories:Inorganic Chemicals;Inorganics;Industrial/Fine Chemicals;Ammonium Salts;Metal and Ceramic Science;Salts;halometallate salts;Ammonium Salts;Materials Science;Metal and Ceramic Science;NH3;Ultra-High Purity Materials;Preservative
Mol File:16919-19-0.mol
Ammonium hexafluorosilicate Structure
Ammonium hexafluorosilicate Chemical Properties
Melting point °Cd ec.)
density 2.01 g/mL at 25 °C(lit.)
vapor pressure 9.99Pa at 20℃
solubility water solubility 18 g/100 g water.
form Crystalline Powder and Chunks
Specific Gravity2.011
color White
Water Solubility Slightly soluble in water. Insoluble in alcohol and acetone.
Hydrolytic Sensitivity0: forms stable aqueous solutions
Merck 14,527
Exposure limitsACGIH: TWA 2.5 mg/m3
NIOSH: IDLH 250 mg/m3; TWA 2.5 mg/m3
LogP-6.01 at 20℃
CAS DataBase Reference16919-19-0(CAS DataBase Reference)
EPA Substance Registry SystemAmmonium silicofluoride (16919-19-0)
Safety Information
Hazard Codes T
Risk Statements 23/24/25
Safety Statements 26-45
RIDADR UN 2854 6.1/PG 3
WGK Germany 2
RTECS VV7800000
Hazard Note Toxic
TSCA Yes
HazardClass 6.1
PackingGroup III
HS Code 2826908090
Hazardous Substances Data16919-19-0(Hazardous Substances Data)
ToxicityLD orally in guinea pigs: 150 mg/kg (Simonin, Pierron)
MSDS Information
ProviderLanguage
Ammonium hexafluorosilicate English
SigmaAldrich English
ALFA English
Ammonium hexafluorosilicate Usage And Synthesis
Chemical Propertieswhite slightly adhering crystalline powder
Chemical PropertiesAmmonium hexafluorosilicate is a white crystalline powder. Odorless.
Physical propertiesd 2.01 g cm?3; decomposes prior to melting; odorless.
UsesAmmonium hexafluorosilicate is used as a disinfectant and analytical reagent. It finds application in etching glass, metal casting, and electroplating. It is also employed as a wood preservative agent and mothproofing agent in textiles. It plays a useful application in soldering flux. It is also used to arrest caries treatment without discoloration on demineralized primary tooth enamel.
UsesIn pesticides; in soldering flux; etching glass.
General DescriptionA white crystalline solid. Noncombustible. Corrodes aluminum. Used as a disinfectant, in etching glass, metal casting, and electroplating.
Air & Water ReactionsWater soluble.
Reactivity ProfileSalts, basic, such as Ammonium hexafluorosilicate, are generally soluble in water. The resulting solutions contain moderate concentrations of hydroxide ions and have pH's greater than 7.0. They react as bases to neutralize acids. These neutralizations generate heat, but less or far less than is generated by neutralization of the bases in reactivity group 10 (Bases) and the neutralization of amines. They usually do not react as either oxidizing agents or reducing agents but such behavior is not impossible.
HazardVery toxic; fatal.
Health HazardInhalation of dust can cause pulmonary irritation and can be fatal in some cases. Ingestion may be fatal. Contact with dust causes irritation of eyes and irritation or ulceration of skin.
Fire HazardSpecial Hazards of Combustion Products: Toxic and irritating hydrogen fluoride, silicon tetrafluoride, and oxides of nitrogen may form in fires.
Flammability and ExplosibilityNotclassified
Potential ExposureThis material is used as a pesticide and miticide, wood preservative, soldering flux; light metal casting; and in the etching of glass.
ShippingUN2856 Fluorosilicates, n.o.s., Hazard Class: 6.1; Labels: 6.1-Poisonous materials, Technical Name Required.
Purification MethodsCrystallise the salt from water (2mL/g). After 3 recrystallisations, the Technical grade salt has Li, Na, K and Fe at 0.3, 0.2, 0.1 and 1.0 ppm respectively.
IncompatibilitiesAqueous solution is highly corrosive. Contact with acids reacts to form hydrogen fluoride, which is a highly corrosive and forms a toxic gas. Corrosive to aluminum. Incompatible with oxidizers (chlorates, nitrates, peroxides, permanganates, perchlorates, chlorine, bromine, fluorine, etc.); contact may cause fires or explosions. Keep away from alkaline materials, strong bases, strong acids, oxoacids, epoxides. Ammonium fluorosilicate reacts with water to form hydrofluoric acid, a source of fluoride ions. Unlike other halide ions, the fluoride ion is highly reactive, acting as a weak base and participating in some unique reactions. In particular, fluorides react strongly with compounds containing calcium, magnesium, or silicon ions, which means that solutions containing soluble fluorides are corrosive to both living tissue and glass. Hydrofluoric acid can cause severe chemical burns and is one of the few materials that can etch glass. It is also a toxic gas in its anhydrous form.
Waste DisposalConsult with environmental regulatory agencies for guidance on acceptable disposal practices. Generators of waste containing this contaminant (≥100 kg/mo) must conform with EPA regulations governing storage, transportation, treatment, and waste disposal. Incineration.
Ammonium hexafluorosilicate Preparation Products And Raw materials
Raw materialsAmmonium bicarbonate-->Hexafluorosilicic acid-->Silica sand
Ammonium hexafluorosilicate Ammonium hydroxide Fluorosilicate AMMONIUM Ammonium formate Seractide Hexafluorosilicic acid Ammonium nitrate Potassium fluorosilicate AMMONIUM HEXAFLUOROSILICATE ((NH4)2SIF6) 99.999% 5G Magnesium hexafluorosilicate hexahydrate Ammonium chloride Sodium fluorosilicate Zinc silicofluoride Ammonium acetate Molybdic acid Ammonium carbonate Ammonium sulfate

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