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372757

Sigma-Aldrich

Fluorosilicic acid solution

20-25 wt. % in H2O

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Synonym(s):
Dihydrogen hexafluorosilicate
Linear Formula:
H2SiF6
CAS Number:
Molecular Weight:
144.09
MDL number:
eCl@ss:
38130308
PubChem Substance ID:
NACRES:
NA.23

form

liquid

concentration

20-25 wt. % in H2O

density

1.22 g/mL at 25 °C

SMILES string

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

InChI

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

InChI key

ZEFWRWWINDLIIV-UHFFFAOYSA-N

General description

Fluorosilicic acid may be produced as a byproduct during the manufacture of phosphate fertilizer. It may also be prepared by treating grounded phosphate rock with sulphuric acid.1

Packaging

Packaged in poly bottles

Pictograms

CorrosionSkull and crossbones

Signal Word

Danger

Hazard Statements

Hazard Classifications

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

Storage Class Code

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

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Regulatory Information

新产品

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Mbarka Gouider et al.
Journal of hazardous materials, 170(2-3), 962-968 (2009-06-16)
Fluoride content and flow-rate of fertilizer plant wastewater from phosphoric acid and/or triple superphosphate (TSP) production lead to the discharge of several thousand tons of fluoride (F(-)) per year and even more for phosphate (PO4(3-)). Since sustainability is an important
G M Whitford et al.
Archives of oral biology, 53(11), 1037-1041 (2008-06-03)
Fluoride in drinking water may be present from natural sources or added as sodium fluoride (NaF), sodium silicofluoride (Na(2)SiF(6)) or fluorosilicic acid (H(2)SiF(6)). Results from an early study with rats suggested that, when ingested as Na(2)SiF(6), the absorption and excretion
Fate of fluorosilicate drinking water additives.
Edward Todd Urbansky
Chemical reviews, 102(8), 2837-2854 (2002-08-15)
Water fluoridation: pollutant or panacea?
D Mac Auley
Irish medical journal, 93(6), 165-166 (2000-12-06)
J A Lalumandier et al.
Journal of public health dentistry, 61(2), 92-98 (2001-07-28)
We determined the knowledge level of water plant operators who fluoridate drinking water, and we compared small and large water plants. A pretested survey was sent to 2,381 water plant operators in 12 states that adjust the fluoride concentration of

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