16919-19-0

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 NO: 16919-19-0
• Molecular Formula: F6H8N2Si
• Molecular Weight: 178.15
• EINECS: 240-968-3
• Product Categories: halometallate salts;Ammonium Salts;Materials Science;Metal and Ceramic Science;NH3;Ultra-High Purity Materials;Preservative;Industrial/Fine Chemicals;Inorganic Chemicals;Inorganics;Ammonium Salts;Metal and Ceramic Science;Salts
• Mol File: 16919-19-0.mol
• Article Data: 0

Chemical Properties

• Melting Point: °Cd ec.)
• Appearance: White/Crystalline Powder and Chunks
• Density: 2.01 g/mL at 25 °C(lit.)
• Vapor Pressure: 9.99Pa at 20℃
• Solubility: water solubility 18 g/100 g water.
• Water Solubility: Slightly soluble in water. Insoluble in alcohol and acetone.
• Merck: 14,527
• CAS DataBase Reference: Ammonium hexafluorosilicate(CAS DataBase Reference)
• NIST Chemistry Reference: Ammonium hexafluorosilicate(16919-19-0)
• EPA Substance Registry System: Ammonium hexafluorosilicate(16919-19-0)

Safety Data

• Hazard Codes: T
• Statements: 23/24/25
• Safety Statements: 26-45
• RIDADR: UN 2854 6.1/PG 3
• WGK Germany: 2
• RTECS: VV7800000
• TSCA: Yes
• HazardClass: 6.1
• PackingGroup: III
• Hazardous Substances Data: 16919-19-0(Hazardous Substances Data)

Usage

Description

Ammonium hexafluorosilicate is a white crystalline solid that is odorless, noncombustible, and has the ability to corrode aluminum. It is a slightly adhering crystalline powder with a density of 2.01 g/cm3 and decomposes prior to melting.

Uses

1. Used in Disinfection and Analytical Reagents:
Ammonium hexafluorosilicate is used as a disinfectant and analytical reagent due to its effective properties in these applications.
2. Used in Glass Etching:
Ammonium hexafluorosilicate is used as an etching agent for glass, providing a controlled and precise etching process.
3. Used in Metal Casting:
It is employed in the metal casting industry, where it aids in the casting process by improving the quality and finish of the cast metal.
4. Used in Electroplating:
Ammonium hexafluorosilicate is used in electroplating to enhance the plating process and improve the quality of the plated surface.
5. Used as a Wood Preservative Agent:
It serves as a wood preservative agent, helping to protect wood from decay and damage caused by environmental factors and insects.
6. Used as a Mothproofing Agent in Textiles:
Ammonium hexafluorosilicate is used in the textile industry as a mothproofing agent to protect fabrics from damage caused by moths and other insects.
7. Used in Solder Flux:
It plays a useful role in soldering flux, improving the soldering process and ensuring a strong and durable bond between metal surfaces.
8. Used in Dental Caries Treatment:
Ammonium hexafluorosilicate is used to arrest caries treatment without causing discoloration on demineralized primary tooth enamel, making it a valuable component in dental care.
9. Used in Pesticides:
It is also utilized in the production of pesticides, where it contributes to the effectiveness of the product in controlling pests.
10. Used in Solder Flux (again, for clarity):
Ammonium hexafluorosilicate is also used in soldering flux, reiterating its importance in the soldering process for ensuring a strong and durable bond between metal surfaces.

Air & Water Reactions

Water soluble.

Reactivity Profile

Salts, 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.

Hazard

Very toxic; fatal.

Health Hazard

Inhalation 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 Hazard

Special Hazards of Combustion Products: Toxic and irritating hydrogen fluoride, silicon tetrafluoride, and oxides of nitrogen may form in fires.

Flammability and Explosibility

Notclassified

Purification Methods

Crystallise 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.

InChI:InChI=1/FO2Si.H3N/c1-4(2)3;/h;1H3/q-1;/p+1

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