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01302

Fluosilicic acid

Name: Fluosilicic acid
Brand: SIAL

purum, 33.5-35%

Synonym(s):

Fluorosilicic acid, Hexafluorosilicic acid, Hydrogen hexafluorosilicate

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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

Concentration:

33.5-35%

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grade

purum

Quality Level

200

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 (PO₄^3-): ≤1000 mg/kg, sulfate (SO₄^2-): ≤0.2%

cation traces

Fe: ≤100 mg/kg

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

Related Categories

Acids for Laboratory, Analysis, and Regulated Applications

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.

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.

pictograms

GHS06,GHS05

signalword

Danger

hcodes

H302,H311,H314

pcodes

P270 - P280 - P301 + P312 - P303 + P361 + P353 - P304 + P340 + P310 - P305 + P351 + P338

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

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High-silica fluosilicic acids: Specific reactions and the equilibrium with silica.

Thomsen SM.

Journal of the American Chemical Society, 74(7), 1690-1693 (1952)

Fluosilicic acid.

Journal of Chemical Education, 35(11), 562-562 (1958)

"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)

Effect of surfactant on particle morphology for liquid phase deposition of submicron silica.

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

Confirmation of and explanations for elevated blood lead and other disorders in children exposed to water disinfection and fluoridation chemicals.

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

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Global Trade Item Number

SKU	GTIN
01302-6X1L	04061838608925
01302-1L	04061838608918

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