Hexafluorosilicic acid CAS#16961-83-4

Hexafluorosilicic acid CAS#16961-83-4

Wide Industrial Applicability:Suitable for use across water treatment, chemical manufacturing, metallurgy, and organic synthesis, offering broad application versatility.


Key Raw Material for Fluoride Compounds:An essential precursor for the production of aluminum fluoride, cryolite, and various hexafluorosilicate salts, supporting stable downstream manufacturing.


Functional Performance in Metallurgy:Effectively used as an electrolyte in the Betts electrolytic process, contributing to efficient and reliable lead refining operations.


High Reactivity in Chemical Synthesis:Acts as a specialized reagent for selective Si–O bond cleavage in silyl ethers, enabling precise control in organic synthesis processes.



Phone :+86 15966245583
WhatsApp :+86 15966245583
Email :admin@kaiviochem.com
Get a quote
product description

Product Description of Hexafluorosilicic acid CAS#16961-83-4

Hexafluorosilicic acid is an inorganic acid with broad industrial applications. It is mainly used in water fluoridation to reduce dental caries incidence. It serves as a key raw material for manufacturing aluminum fluoride, cryolite and various hexafluorosilicate salts, and is also applied in the production of silicon and silicon dioxide. It acts as an electrolyte in the Betts electrolytic process for lead refining. In organic synthesis, it is used as a special reagent for the selective cleavage of Si–O bonds in silyl ethers.


Product Application of Hexafluorosilicic acid CAS#16961-83-4

Hexafluorosilicic acid is widely used as a fluoride source and can be processed into various high-value hexafluorosilicate salts. It acts as an electrolyte in the Betts electrolytic process for lead refining. In organic chemistry, it serves as a key reagent for cleaving Si–O bonds in silyl ethers. Furthermore, it is applied as a wood preservative and for surface modification of calcium carbonate.

Parameters


Boiling point108-109°C
density1.22 g/mL at 20 °C (lit.) 1.31 g/mL at 25 °C
vapor pressure23hPa at 19.85℃
refractive index1.35
Fp108-109°C
storage temp.−20°C
solubilityH2O: 1 mg/mL, clear, colorless
formLiquid
pka1.83[at 20 ℃]
colorClear colorless
Specific Gravity1.38 (40%)
Water SolubilityMiscible with water.
Hydrolytic Sensitivity0: forms stable aqueous solutions
Merck144,182
Exposure limitsACGIH: TWA 2.5 mg/m3
NIOSH: IDLH 250 mg/m3; TWA 2.5 mg/m3
Stability:Stable in aqueous solution.
InChI1S/F4Si.2FH/c1-5(2,3)4;;/h;2*1H
InChIKeyAUJBMDCSBIPDEH-UHFFFAOYSA-N
SMILESF.F.F[Si](F)(F)F
CAS DataBase Reference16961-83-4(CAS DataBase Reference)
EPA Substance Registry SystemFluosilicic acid (16961-83-4)


Safety Information


Hazard CodesC
Risk Statements34-35-20/21/22
Safety Statements26-36/37/39-45-27
RIDADRUN 1778 8/PG 2
WGK Germany3
RTECSVV8225000
F8月10日
Hazard NoteCorrosive
TSCATSCA listed
HazardClass8
PackingGroupII
HS Code28111990
Storage Class6.1D - Non-combustible acute toxic Cat.3
toxic hazardous materials or hazardous materials causing chronic effects
Hazard ClassificationsAcute Tox. 3 Dermal
Acute Tox. 4 Oral
Eye Dam. 1
Skin Corr. 1
Hazardous Substances Data16961-83-4(Hazardous Substances Data)
ToxicityLD50 oral in rat: 430mg/kg


Factory Showcase
拼图_美图设计室-(1)
Quality Control Lab
实验室
Shipping And Transportation

Delivery Time

Inventory 2-3 working days New manufacturing 7-10 working days

Mode of Transportation
1. By Air, fast but expensive.
2. By Sea, usual and economy.
3. By Train, suit for middle Asia countries.
4. By Express, suit for small package.
We only provide highest quality goods available, accompanied by after support!

拼图_美图设计室
FAQ

1. Why Supply Chain Transparency Matters in Global Chemical Procurement
Chemical buyers evaluate more than price and delivery time. Clear specifications, matching batch documents, consistent packaging information, and traceable logistics all affect customs clearance, warehouse inspection, and production use.
When selecting a supplier, buyers should review how the company confirms specifications, manages documents, handles changes, and responds to problems. Transparent processes help reduce order risks and improve long-term procurement reliability.


2. Seven Essential Details for a Chemical Product Inquiry
A product name alone is often insufficient for an accurate quotation. Buyers should provide the product name and CAS number, key specifications or purity, final application, required quantity, packaging requirements, destination, and expected delivery time or preferred Incoterms.
If COA, SDS, TDS, special labels, certifications, or registration documents are required, these details should also be included in the initial inquiry. Complete information helps suppliers confirm product, logistics, and documentation conditions more efficiently.


3. What Are the Differences Between COA, SDS, and TDS?
A COA is a batch-specific Certificate of Analysis showing test items, required ranges, and actual results. It is mainly used for quality verification and incoming inspection.
An SDS provides safety, handling, storage, emergency, and transportation information. A TDS describes typical product properties, technical parameters, and application guidance. Buyers should confirm the required document version, language, and applicable standards before placing an order.


4. Key Conditions to Confirm Before International Chemical Transportation
Before shipment, confirm the product identity, physical form, transport classification, and applicable regulations. An SDS is an important reference, but the final shipping arrangement must also meet regulatory and carrier requirements.
Packaging, sealing, moisture protection, palletizing, labels, ports, documents, Incoterms, and transport schedules should be clearly confirmed. Early verification helps prevent delays caused by carrier restrictions or incomplete documentation.


5. How to Evaluate Chemical Product Sample Test Results
Sample evaluation should consider both product compliance and application performance. Laboratory results do not always guarantee the same performance in every formulation or production process.
Before testing, record the sample batch, COA, storage condition, and sampling method. During application tests, keep consistent records of formulation, dosage, process conditions, and results. After approval, reconfirm the formal order specifications, inspection method, packaging, and batch documents.

Contact Us
Submit Sourcing Inquiry & Request Sample
Recommendation