Sodium Fluorosilicate CAS#16893-85-9

High Purity and Stable Crystal FormAppears as white crystals or colorless hexagonal crystals with uniform structure, ensuring consistent quality and easy handling in industrial applications.


Good Chemical ReactivityEasily decomposes in alkaline solutions and at high temperatures to form useful products such as sodium fluoride and silica, making it suitable as a reactive intermediate in chemical processing.


Excellent Moisture Absorption AbilityPossesses hygroscopic properties that enhance its performance in formulations requiring controlled moisture interaction.


Wide Solubility CompatibilityShows good solubility in acids and selected solvents, providing flexibility for use in various chemical and industrial systems.


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Product Description

Product Description of Sodium Fluorosilicate CAS#16893-85-9

Sodium fluorosilicate is available as white crystals, crystalline powder or colorless hexagonal crystals. It is odorless, tasteless and hygroscopic, with a relative density of 2.68. It is soluble in ethyl ether, insoluble in alcohol, and more soluble in acids than in water. It decomposes in alkaline solution into sodium fluoride and silica, and breaks down into sodium fluoride and silicon tetrafluoride when heated to around 300 °C.


Product Application of Sodium Fluorosilicate CAS#16893-85-9

Sodium hexafluorosilicate is used for water fluoridation and as a raw material for opal glass and ore refining. It serves as feedstock for manufacturing fluoride chemicals including sodium fluoride, sodium hexafluoroaluminate, potassium hexafluorosilicate, ammonium fluoride and calcium fluoride. It is also applied as a flotation agent, wet etching component, wood preservative, brazing flux and welding compound, as well as an active ingredient in concrete.

Product Information

Parameters


Melting pointmelts at red heat, decomposing [MER06]
Boiling point620℃[at 101 325 Pa]
density2.68 g/mL at 25 °C(lit.)
vapor pressure0.01Pa
refractive index1.31
solubilityinsoluble in ethanol
formCrystals
colorWhite
Specific Gravity2.68
Odorodorless
Water SolubilitySlightly soluble in water. Solubility increases with temperature. Insoluble in alcoholSlightly soluble in water. Insoluble in alcohol.
Merck148,624
Exposure limitsACGIH: TWA 2.5 mg/m3
NIOSH: IDLH 250 mg/m3; TWA 2.5 mg/m3
Stability:Stable. Incompatible with oxidizing agents, water. Moisture sensitive.
LogP0.001
CAS DataBase Reference16893-85-9(CAS DataBase Reference)
EPA Substance Registry SystemSodium fluosilicate (16893-85-9)


Safety Information


Hazard CodesT,Xi
Risk Statements23/24/25
Safety Statements26-45
RIDADRUN 2674 6.1/PG 3
WGK Germany2
RTECSVV8410000
Hazard NoteIrritant
TSCAYes
HazardClass6.1
PackingGroupIII
HS Code2826908090
Hazardous Substances Data16893-85-9(Hazardous Substances Data)
ToxicityLD in rabbits (mg F/kg): 76 intragastric; in rats (mg F/kg): 42 s.c. (Muehlberger); LD in guinea pigs (mg/kg): 250 orally, 500 s.c. (Waldbott)


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