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Sodium hexafluorosilicate

氟硅酸钠

Also known as: Sodium silicofluoride, Sodium fluorosilicate, Sodium fluosilicate, Disodium hexafluorosilicate, Silicate(2-), hexafluoro-, sodium (1:2)

Sodium hexafluorosilicate (CAS 16893-85-9) is a compound in the Inorganic Chemicals category listed in the Jingsj chemical database. It has the molecular formula F6Na2Si and a molecular weight of 188.05500 g/mol. It is also known as Sodium silicofluoride, Sodium fluorosilicate and Sodium fluosilicate. Key property: a density of 2.68 g/mL at 25 °C(lit.). It is classified under GHS with signal word Danger and hazard statements H301 — Toxic if swallowed, H311 — Toxic in contact with skin and H331 — Toxic if inhaled. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
16893-85-9
Jingsj CID
J-2889-7
Molecular Formula
F6Na2Si
Chinese Name
氟硅酸钠
Molecular Weight
188.05500 g/mol
Category
Inorganic Chemicals
Last updated
8/21/2026

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Physicochemical Properties

Density2.68 g/mL at 25 °C(lit.)
Exact Mass187.94700
LogP2.14040
Refractive Index1.310

GHS Safety & Compliance

Acute ToxicitySignal word: Danger
  • H301 — Toxic if swallowed
  • H311 — Toxic in contact with skin
  • H331 — Toxic if inhaled

Frequently Asked Questions

What is the CAS number of Sodium hexafluorosilicate?

The CAS number of Sodium hexafluorosilicate is 16893-85-9.

What are the molecular formula and molecular weight of Sodium hexafluorosilicate?

Sodium hexafluorosilicate has molecular formula F6Na2Si and molecular weight 188.05500 g/mol.

Is Sodium hexafluorosilicate hazardous?

Sodium hexafluorosilicate has GHS signal word Danger and hazard statements H301 — Toxic if swallowed; H311 — Toxic in contact with skin; H331 — Toxic if inhaled.

Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.

Last updated:

How to cite: Jingsj. "Sodium hexafluorosilicate (CAS 16893-85-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-2889-7 (accessed 2026-10-28).

Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.