Molekula

Hexafluorosilicic Acid 34%

SKU 90035781 CAS 16961-83-4 HsSiF6 MW 144.09 Available on enquiry

Supplying 4,500+ customers in over 80 countries

ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 1999 · Certificate of Analysis with every batch

Hexafluorosilicic acid (H₂SiF₆) is a highly soluble, corrosive inorganic acid primarily used in water fluoridation, aluminum etching, and as a catalyst in chemical synthesis. It is a 34% aqueous solution with strong industrial and municipal applications. This product has a CAS number of 16961-83-4, a molecular formula of H₂SiF₆, and a molecular weight of 144.09 g/mol. It is stored at ambient conditions and carries a **Danger** signal word due to its corrosive and hazardous nature. Molekula supplies hexafluorosilicic acid from research to bulk quantities with full documentation and ISO 9001:2015 traceability.

This substance is available from Molekula on enquiry. Full specification, Safety Data Sheet and Certificate of Analysis documentation are provided with your quotation once our team confirms the grade and pack size you need.

Contact sales

Expect a response within hours Speak to a chemist: +44 (0) 3302 000333

Paste this into the structure editor to work on it

Overview

SKU: 90035781
CAS Number: 16961-83-4
IUPAC Name: hexafluorosilicon(2-);hydron
Molecular Formula: HsSiF6
Molecular Weight: 144.09
Exact Mass: 143.983
SMILES: [H+].[H+].F[Si-2](F)(F)(F)(F)F
InChIKey: OHORFAFFMDIQRR-UHFFFAOYSA-P
InChI: InChI=1S/F6Si/c1-7(2,3,4,5)6/q-2/p+2
PubChem CID: 21863527

Synonyms

Dihydrogen hexafluorosilicate(2-)
FLUOROSILIC ACID
Fluorosilicic acid
Fluorosilicic acid (H2SiF6)
Hydrofluorosilicic acid
Hydrofluosilicic acid
HYDROGEN HEXAFLUOROSILICATE (H2SIF6)
Silicate(2-), hexafluoro-, dihydrogen
Silicofluoric acid
Silicon hexafluoride dihydride

See all 3 other grades of CAS 16961-83-4 →

Frequently asked questions

What is hexafluorosilicic acid (34%) commonly used for?

Hexafluorosilicic acid is primarily used in water fluoridation, aluminum etching, and as a catalyst in organic synthesis.

What is the chemical formula and molecular weight of hexafluorosilicic acid?

The formula is **H₂SiF₆** (not HsSiF₆), and the molecular weight is **144.09 g/mol**.

How should hexafluorosilicic acid (34%) be stored?

Store in a tightly sealed container at ambient temperature, away from incompatible materials like strong oxidizers.

What grade or purity is available for hexafluorosilicic acid?

Molekula supplies **technical grade (34% solution)** for industrial applications; higher purities may be available upon request.

Can Molekula supply hexafluorosilicic acid in bulk quantities?

Yes, bulk quantities are available—please contact our sales team for pricing and lead times.

What documentation comes with an order of hexafluorosilicic acid?

Each order includes a **Certificate of Analysis (CoA)**, Material Safety Data Sheet (MSDS), and a compliance certificate for regulatory requirements.

Related products

Molekula has supplied fine chemicals and biochemicals since 1999, and its facilities are ISO 9001:2015 and ISO 14001:2015 certified. Every dispatched batch is logged with a batch number and matched to a Certificate of Analysis, and Safety Data Sheets are available in five languages.