Skip to Content
Merck
CN

01302

Fluosilicic acid

purum, 33.5-35%

Synonym(s):

Fluorosilicic acid, Hexafluorosilicic acid, Hydrogen hexafluorosilicate

Sign In to View Organizational & Contract Pricing.

Select a Size

About This Item

Linear Formula:
H2SiF6
CAS Number:
16961-83-4
Molecular Weight:
144.09
UNSPSC Code:
12352300
eCl@ss:
38130308
PubChem Substance ID:
57646695
NACRES:
NA.21
MDL number:
MFCD00036289

Key Documents

View All Documentation
Technical Service
Need help? Our team of experienced scientists is here for you.
Let Us Assist
Technical Service
Need help? Our team of experienced scientists is here for you.
Let Us Assist

Product Name

Fluosilicic acid, purum, 33.5-35%

SMILES string

F.F.F[Si](F)(F)F

InChI

1S/F4Si.2FH/c1-5(2,3)4;;/h;2*1H

InChI key

ZEFWRWWINDLIIV-UHFFFAOYSA-N

grade

purum

concentration

33.5-35%

impurities

≤0.003% heavy metals (as Pb)

density

1.22 g/mL at 20 °C (lit.)
1.31 g/mL at 25 °C

anion traces

chloride (Cl-): ≤0.2%
phosphate (PO43-): ≤1000 mg/kg
sulfate (SO42-): ≤0.2%

cation traces

Fe: ≤100 mg/kg

Quality Level

200

Looking for similar products? Visit Product Comparison Guide

Related Categories

Application

Fluosilicic acid (FSA, H2SiF6) has been used in the following studies:
  • Fluoridation of fluoridated municipal water supplies.
  • Surface modification of calcium carbonate.
  • Liquid phase deposition (LPD) of silica.

General description

High-silic fluoro silicic acids have been prepared. They have desired amount of extra silica upto 18% more than the composition as represented by H2SiF6. Preparation and properties of fluosilicic acid have been reported. Fluosilicic acid can be obtained as a major byproduct of phosphate fertilizer industry.It can be used in the preparation of sodium fluorosilicate, via neutralization with sodium chloride. It can also undergo neutralization with ammonia to produce ammonium fluoride and silica.

pictograms

Skull and crossbonesCorrosion
GHS06,GHS05

signalword

Danger

Hazard Classifications

Acute Tox. 3 Dermal - Acute Tox. 4 Oral - Eye Dam. 1 - Skin Corr. 1

Storage Class

6.1D - Non-combustible acute toxic Cat.3 / toxic hazardous materials or hazardous materials causing chronic effects

wgk

WGK 2

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Faceshields, Gloves, Goggles, type ABEK (EN14387) respirator filter

Regulatory Information

危险化学品
This item has

Choose from one of the most recent versions:

Certificates of Analysis (COA)

Lot/Batch Number
MKCJ6400
MKCD1518
MKCC1481
STBG6209
STBG6210

Don't see the Right Version?

If you require a particular version, you can look up a specific certificate by the Lot or Batch number.

Search for a COA

Already Own This Product?

Find documentation for the products that you have recently purchased in the Document Library.

Visit the Document Library

Myron J Coplan et al.
Neurotoxicology, 28(5), 1032-1042 (2007-04-11)
Silicofluorides (SiFs), fluosilicic acid (FSA) and sodium fluosilicate (NaFSA), are used to fluoridate over 90% of US fluoridated municipal water supplies. Living in communities with silicofluoride treated water (SiFW) is associated with two neurotoxic effects: (1) Prevalence of children with
Elizabeth A Whitsitt et al.
Journal of colloid and interface science, 287(1), 318-325 (2005-05-26)
Liquid phase deposition (LPD) of silica from soluble silicates has been performed in the presence of dodecyltrimethylammonium bromide (DTAB), sodium dodecyl sulfate (SDS) and sodium dodecylbenzyl sulfate (SDBS). The morphology of the silica varies between semi-ordered uniform spheres to low
"Recovery of high surface area mesoporous silica from waste hexafluorosilicic acid (H 2 SiF 6) of fertilizer industry"
Sarawade.BP, et al.
Journal of Hazardous Materials, 173(01), 576-580 (2010)
Fluosilicic acid.
Journal of Chemical Education, 35(11), 562-562 (1958)
Akash K Singh et al.
Aging cell, 21(9), e13675-e13675 (2022-08-14)
The master epigenetic regulator lysine acetyltransferase (KAT) p300/CBP plays a pivotal role in neuroplasticity and cognitive functions. Recent evidence has shown that in several neurodegenerative diseases, including Alzheimer's disease (AD), the expression level and function of p300/CBP are severely compromised
View All Related Papers

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service