Fluorosilicic acid

CAS 16961-83-4  ·  F6Si  ·  MW 144.091 g/mol

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3D model Fluorosilicic acid, CAS 16961-83-4, molecular formula F6Si, molar mass 144.091 g/mol
About Fluorosilicic acid

Fluorosilicic acid is a chemical compound registered under number CAS 16961-83-4, with the molecular formula F6Si, and a molar mass of 144.091 g/mol.

The molecule contains 9 atoms connected by 6 chemical bonds. The full systematic IUPAC name of this compound is hexafluorosilicon(2-);hydron. The interactive 3D model above lets you view the spatial arrangement of the atoms — you can rotate it with the mouse, zoom with the scroll wheel, and switch between skeletal / Ball & Stick / Space Fill visualization modes.

In terms of physicochemical properties, polar surface area PSA = 0 Ų, 2 donors and 7 hydrogen bond acceptors. These parameters are key when assessing bioavailability and interaction with biomolecules.

Chemical data for this compound comes from PubChem (NIH NLM NCBI), one of the world's largest chemical databases. All information is updated automatically and enriched with GHS hazard statement translations compliant with the CLP Regulation (EC 1272/2008). The widget above may be used for educational, research and commercial purposes.

Physicochemical properties
Molecular formulaF6Si
Molar mass144.091 g/mol
IUPAChexafluorosilicon(2-);hydron
SMILES[H+].[H+].F[Si-2](F)(F)(F)(F)F
InChIKeyOHORFAFFMDIQRR-UHFFFAOYSA-P
logP (XLogP3)—
PSA0 Ų
HBD / HBA2 / 7
PubChem CIDCID 21863527 ↗
GHS safety

Signal word: Danger

GHS05
GHS05

H314 — Causes severe skin burns and eye damage

Scientific literature

Related literature

4 articles · 2 open access · Sources: PubMed, OpenAlex, Semantic Scholar

Filters:Export:📄 BibTeX📑 RIS📋 EndNote🔧 CSL-JSON

📈 Publication timeline (number of articles: 4)

2007: number of articles 120072021: number of articles 220212022: number of articles 12022

Bar height = number of articles in a given year. Hover over a bar to see details.

Data from PubMed (NIH NLM), OpenAlex (CC0), Semantic Scholar (AI2). AI Summary generated by Semantic Scholar TLDR. Articles marked with require paid access.

Synonyms
Hexafluorosilicic acid · 16961-83-4 · Fluorosilicic acid · Hydrofluosilicic acid · Hydrofluorosilicic acid · Silicon hexafluoride dihydride · Fluorosilicic acid (H2SiF6) · Silicate(2-), hexafluoro-, dihydrogen · FLUOROSILIC ACID · 53V4OQG6U1 · Dihydrogen hexafluorosilicate(2-) · NSC-16894 · HYDROGEN HEXAFLUOROSILICATE (H2SIF6) · Silicofluoric acid · Hexafluosilicic acid
Data sources
Related molecules
📜 License & provenancePREDICTED MODEL · NOT VERIFIEDMolGod_License_1
PREDICTED MODEL — NOT VERIFIED
computed by MolGod Scientific · experimental feature (beta) · may contain errors
ILLUSTRATIVE FRAGMENT ARRANGEMENT — relative positions are not structural data

No source 3-D conformer was available to MolGod for this substance. MolGod Scientific computed this geometry from the structural formula with RDKit 2026.03.6 (ETKDGv3 conformer generation, MMFF94 force-field optimisation; lowest-energy converged conformer of a fixed-seed set). It is not a measured structure, it does not come from PubChem, and it has not been compared with experimental data. It shows one possible conformation.

This substance consists of 3 separate components (for example ions). Each component was computed separately; they are arranged radially around a layout anchor for visualisation only (at least 3.0 Å apart). Their relative positions are not a crystal structure, coordination geometry, ionic contacts or any experimentally determined arrangement.

1 stereo element(s) undefined in the source record (1 stereocentre(s), 0 double-bond E/Z) were assigned arbitrarily; the model shows one stereoisomer only, which may not be the naturally occurring or commercial form.

Methods and references
  1. RDKit: Open-source cheminformatics, version 2026.03.6. Zenodo. doi:10.5281/zenodo.22140358 (all versions: doi:10.5281/zenodo.591637)
  2. Riniker S, Landrum GA. Better Informed Distance Geometry: Using What We Know To Improve Conformation Generation. J. Chem. Inf. Model. 2015, 55, 2562-2574. doi:10.1021/acs.jcim.5b00654
  3. Wang S, Witek J, Landrum GA, Riniker S. Improving Conformer Generation for Small Rings and Macrocycles Based on Distance Geometry and Experimental Torsional-Angle Preferences. J. Chem. Inf. Model. 2020, 60, 2044-2058. doi:10.1021/acs.jcim.0c00025
  4. Halgren TA. Merck molecular force field. I. Basis, form, scope, parameterization, and performance of MMFF94. J. Comput. Chem. 1996, 17, 490-519. doi:10.1002/(SICI)1096-987X(199604)17:5/6<490::AID-JCC1>3.0.CO;2-P
  5. Tosco P, Stiefl N, Landrum G. Bringing the MMFF force field to the RDKit: implementation and validation. J. Cheminform. 2014, 6, 37. doi:10.1186/s13321-014-0037-3
  6. Heller SR, McNaught A, Pletnev I, Stein S, Tchekhovskoi D. InChI, the IUPAC International Chemical Identifier. J. Cheminform. 2015, 7, 23. doi:10.1186/s13321-015-0068-4
  7. Kim S, Chen J, Cheng T, et al. PubChem 2025 update. Nucleic Acids Res. 2025, 53, D1516-D1525. doi:10.1093/nar/gkae1059 Compound record: https://pubchem.ncbi.nlm.nih.gov/compound/21863527
  8. Bolton EE, Kim S, Bryant SH. PubChem3D: Conformer generation. J. Cheminform. 2011, 3, 4. doi:10.1186/1758-2946-3-4 (cited for contrast: no source 3-D conformer was available to MolGod for this record)
Fluorosilicic acid (CAS 16961-83-4), F6Si - 3D ball-and-stick molecular model, engraved element symbols (F Si), MolGod STL previewDownload image

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Fluorosilicic acid (CAS 16961-83-4), F6Si - 3D ball-and-stick molecular model, MolGod STL previewDownload image

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Model
Fluorosilicic acid · 16961-83-4
InChIKey
OHORFAFFMDIQRR-UHFFFAOYSA-P
License
CC BY-SA 4.0 International (source rights undetermined — not yet granted)
Attribution
MolGod Scientific — Fluorosilicic acid (CAS 16961-83-4)
License & provenance record
Fluorosilicic acid (CAS 16961-83-4) →
MolGod molecule record
Fluorosilicic acid →
Source data
PubChem CID 21863527 ↗
Model information
STL generated by MolGod · MolGod STL Exporter build 48804cd20b0d · generated 2026-10-14
SHA-256 (STL)
b9ac1b4df2d2ed845820d963e36e48b1c7b634ab945fa31716897485605db874
MD5 (STL)
5d1c2590ee118d98d6655419cb9e11a1
Model identifier
MG-STL-16961-83-4
Transformation
MolGod Scientific ball-and-stick mesh
Changes
PREDICTED geometry computed by MolGod Scientific (RDKit), NOT verified; rendered as a triangulated mesh.
Wikimedia Commons
not published yet

This license applies to the MolGod-created STL mesh, not automatically to third-party source material.

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