Fluosilicic acid

Name: Fluosilicic acid
Brand: Vaqora Chemicals
SKU: VQ-018363

About Fluosilicic acid

Fluosilicic acid (CAS 16961-83-4) is an electronic material offered by Vaqora Chemicals with a typical assay of 33.5–35%. Formula F6H2Si, molecular weight 144.09 g/mol. The IUPAC name is hexafluorosilicon(2-). Hydron. Common synonyms include Fluorosilicic acid and Hexafluorosilicic acid.

It is supplied as a colourless to light yellow liquid. Reported physical data include a density of 1.22 g/mL at 20 °C. Keep containers tightly closed in a cool, well-ventilated area away from heat and ignition sources. It carries the GHS signal word “Danger” with 1 hazard statement. Review the Safety Data Sheet before use.

Typical applications include semiconductor research, electronic devices and thin films. Our customers for this product work in academic and industrial research and electronics and semiconductors.

Vaqora Chemicals supplies Fluosilicic acid in 500 mL, 5 L and 45 kg packs, each shipped with a Certificate of Analysis (COA), and exports worldwide.

Typical applications

Semiconductor research
Electronic devices
Thin films

Industries

Specifications & identifiers

Chemical identifiers
Product name	Fluosilicic acid
Catalogue No.	VQ-018363
CAS Number	16961-83-4
IUPAC name	hexafluorosilicon(2-);hydron
Molecular formula	F₆H₂Si
Molecular weight	144.09 g/mol
Exact mass	143.983
Purity / assay	33.5–35%
HSN code	28111990
InChIKey	OHORFAFFMDIQRR-UHFFFAOYSA-P
SMILES	[H+].[H+].F[Si-2](F)(F)(F)(F)F
PubChem CID	21863527

Physical properties
Physical form	Liquid
Appearance	Colourless to light yellow liquid
Density	1.22 g/mL at 20 °C
H-bond donors / acceptors	2 / 7
TPSA	0 Å²
UN number	UN 1778
Synonyms	Fluorosilicic acid, Hexafluorosilicic acid, Hydrogen hexafluorosilicate, Hydrofluosilicic acid, Hydrofluorosilicic acid, Silicon hexafluoride dihydride, Fluorosilicic acid (H2SiF6), Silicate(2-), hexafluoro-, dihydrogen, Dihydrogen hexafluorosilicate(2-), Silicofluoric acid, Hexafluosilicic acid, Sand acid

Safety & hazard information (GHS)

Corrosive

Signal word: Danger

Hazard statements

H314Causes severe skin burns and eye damage

Precautionary statements: P260, P264, P280, P301 + P330 + P331, P302 + P361 + P354, P304 + P340, P305 + P354 + P338, P316, P321, P363, P405, P501

Classification is indicative (aggregated GHS notifications) and may vary by grade and concentration. Always refer to the SDS supplied with your lot.

Documents

Safety Data Sheet (SDS)16-section GHS · on request Certificate of AnalysisTypical / batch COA · on request Specification sheetTDS / MOA · on request

Frequently asked questions

What is the CAS number of Fluosilicic acid?

The CAS Registry Number of Fluosilicic acid is 16961-83-4. It is also known as Fluorosilicic acid, Hexafluorosilicic acid, Hydrogen hexafluorosilicate.

What is the molecular formula and molecular weight of Fluosilicic acid?

Fluosilicic acid has the molecular formula F6H2Si and a molecular weight of 144.09 g/mol.

Which grade and pack sizes of Fluosilicic acid can I order?

We supply Fluosilicic acid in (33.5–35%) grade, in 500 mL, 5 L, 45 kg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Fluosilicic acid?

Yes. Every lot of Fluosilicic acid is shipped with a batch-specific Certificate of Analysis, and a 16-section GHS Safety Data Sheet is provided with the quotation and the shipment.

Can Fluosilicic acid be shipped internationally?

Yes. Fluosilicic acid is classified as hazardous (UN 1778), so it is packed in UN-approved packaging and shipped as dangerous goods under IATA/IMDG rules. We export worldwide on EXW, FOB, CIF and DAP terms.