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Ammonium hexafluorosilicate

氟硅酸铵

Also known as: Ammonium silicofluoride, Ammonium fluorosilicate, Ammonium fluosilicate, Diammonium hexafluorosilicate, Cryptohalite, Cryptophthalite, Silicate(2-), hexafluoro-, ammonium (1:2)

Ammonium hexafluorosilicate (CAS 16919-19-0) is a compound in the Inorganic Chemicals category listed in the Jingsj chemical database. It has the molecular formula F6H8N2Si and a molecular weight of 178.15300 g/mol. It is also known as Ammonium silicofluoride, Ammonium fluorosilicate and Ammonium fluosilicate. Key properties include a melting point of °Cd ec.) and a density of 2.01 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.
16919-19-0
Jingsj CID
J-49930-5
Molecular Formula
F6H8N2Si
Chinese Name
氟硅酸铵
Molecular Weight
178.15300 g/mol
Category
Inorganic Chemicals
Last updated
8/21/2026

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Physicochemical Properties

Melting Point°Cd ec.)
Density2.01 g/mL at 25 °C(lit.)
Exact Mass178.03600
LogP2.89280

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 Ammonium hexafluorosilicate?

The CAS number of Ammonium hexafluorosilicate is 16919-19-0.

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

Ammonium hexafluorosilicate has molecular formula F6H8N2Si and molecular weight 178.15300 g/mol.

Is Ammonium hexafluorosilicate hazardous?

Ammonium 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. "Ammonium hexafluorosilicate (CAS 16919-19-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-49930-5 (accessed 2026-10-28).

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