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Safety Information

250171

Sigma-Aldrich

Sodium hexafluorosilicate

Synonym(s):

Disodium hexafluorosilicon(2-), Sodium fluosilicate

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About This Item

Linear Formula:
Na2SiF6
CAS Number:
16893-85-9
Molecular Weight:
188.06
EC Number:
240-934-8
MDL number:
MFCD00003491
UNSPSC Code:
12352302
PubChem Substance ID:
24855039
NACRES:
NA.23
form:
powder

form

powder

Quality Level

200

density

2.68 g/mL at 25 °C (lit.)

SMILES string

[Na+].[Na+].F[Si--](F)(F)(F)(F)F

InChI

1S/F6Si.2Na/c1-7(2,3,4,5)6;;/q-2;2*+1

InChI key

TWGUZEUZLCYTCG-UHFFFAOYSA-N

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Pictograms

Skull and crossbones
GHS06

Signal Word

Danger

Hazard Statements

H301 + H311 + H331

Hazard Classifications

Acute Tox. 3 Dermal - Acute Tox. 3 Inhalation - Acute Tox. 3 Oral

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

危险化学品

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Certificates of Analysis (COA)

Lot/Batch Number
MKCQ4303
MKCP4296
MKCN2618
MKCK2607
MKBZ9221V

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Toshiyuki Suge et al.
American journal of dentistry, 19(4), 248-252 (2006-08-31)
To evaluate the occluding ability of ammonium hexafluorosilicate (SiF). Dentin disks prepared from human extracted teeth were grouped as follows to prepare different situations of dentin hypersensitivity: (1) those sonicated for 20 minutes; (2) those treated with 0.5 mol/L EDTA
[Recurrent ventricular fibrillation in magnesium fluosilicate poisoning].
B Suberviola Cañas et al.
Medicina intensiva, 31(6), 344-346 (2007-08-01)
Toshiyuki Suge et al.
Dental materials : official publication of the Academy of Dental Materials, 24(2), 192-198 (2007-06-05)
Diamine silver fluoride [AgF: (NH(3))(2)AgF] has been used clinically in Japan, as it reduces dental caries and dentin hypersensitivity. However, AgF stains the teeth black due to silver precipitation. To overcome this drawback, the authors prepared ammonium hexafluorosilicate [SiF: (NH(4))(2)SiF(6)]
Teresa Lech
Forensic science international, 206(1-3), e20-e24 (2010-07-27)
Fluoride, of all inorganic substances, is among the least likely to be identified by a routine toxicological analysis. Acute poisonings with salts of hydrofluoric or fluorosilicic acid, however, although relatively uncommon, may occur. Some fluorosilicates, salts of fluorosilicic acid (e.g.
Vladimir O Gelmboldt et al.
Acta crystallographica. Section C, Crystal structure communications, 63(Pt 9), o530-o534 (2007-09-01)
In bis(2-carboxypyridinium) hexafluorosilicate, 2C(6)H(6)NO(2)+.SiF6(2-), (I), and bis(2-carboxyquinolinium) hexafluorosilicate dihydrate, 2C(10)H(8)NO(2)+.SiF6(2-).2H2O, (II), the Si atoms of the anions reside on crystallographic centres of inversion. Primary inter-ion interactions in (I) occur via strong N-H...F and O-H...F hydrogen bonds, generating corrugated layers incorporating
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