Hexafluorosilicic acid
氟硅酸
Also known as: Fluorosilicic acid, Silicofluoric acid, Hydrofluosilicic acid, Hydrogen hexafluorosilicate, Hexafluosilicic acid, Hydrosilicofluoric acid
Hexafluorosilicic acid (CAS 16961-83-4) is a compound in the Inorganic Chemicals category listed in the Jingsj chemical database. It has the molecular formula H2SiF6 and a molecular weight of 144.09200 g/mol. It is also known as Fluorosilicic acid, Silicofluoric acid and Hydrofluosilicic acid. Key properties include a boiling point of 108-109°C, a density of 1.22 g/mL at 25 °C and a flash point of 108-109°C. It is classified under GHS with signal word Danger and hazard statements H302 — Harmful if swallowed, H311 — Toxic in contact with skin and H314 — Causes severe skin burns and eye damage. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 16961-83-4
- Jingsj CID
- J-2867-3
- Molecular Formula
- H2SiF6
- Chinese Name
- 氟硅酸
- Molecular Weight
- 144.09200 g/mol
- Category
- Inorganic Chemicals
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 108-109°C |
|---|---|
| Density | 1.22 g/mL at 25 °C |
| Flash Point | 108-109°C |
| Exact Mass | 143.98300 |
| LogP | 2.36540 |
| Refractive Index | 1.3500 |
| Additional Property | H2O: 1 mg/mL, clear, colorless |
GHS Safety & Compliance
- H302 — Harmful if swallowed
- H311 — Toxic in contact with skin
- H314 — Causes severe skin burns and eye damage
Customs & Trade Information
| HS Code | 2811199090 |
|---|
Frequently Asked Questions
What is the CAS number of Hexafluorosilicic acid?
The CAS number of Hexafluorosilicic acid is 16961-83-4.
What are the molecular formula and molecular weight of Hexafluorosilicic acid?
Hexafluorosilicic acid has molecular formula H2SiF6 and molecular weight 144.09200 g/mol.
Is Hexafluorosilicic acid hazardous?
Hexafluorosilicic acid has GHS signal word Danger and hazard statements H302 — Harmful if swallowed; H311 — Toxic in contact with skin; H314 — Causes severe skin burns and eye damage.
Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Hexafluorosilicic acid (CAS 16961-83-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-2867-3 (accessed 2026-10-28).
Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.