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Supelco

Potassium hexafluorosilicate

≥99.0% (T)

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Synonym(s):
Dipotassium hexafluorosilicate, Potassium fluorosilicate, Potassium fluosilicate, Potassium silicofluoride
Linear Formula:
K2SiF6
CAS Number:
16871-90-2
Molecular Weight:
220.27
EC Number:
240-896-2
MDL number:
MFCD00040666
UNSPSC Code:
12000000
PubChem Substance ID:
329758873
NACRES:
NA.21

Quality Level

100

Assay

≥99.0% (T)

form

solid

density

2.665 g/mL at 25 °C (lit.)

anion traces

chloride (Cl-): ≤500 mg/kg
sulfate (SO42-): ≤200 mg/kg

cation traces

Ca: ≤50 mg/kg
Cd: ≤50 mg/kg
Co: ≤50 mg/kg
Cu: ≤50 mg/kg
Fe: ≤100 mg/kg
Na: ≤1000 mg/kg
Ni: ≤50 mg/kg
Pb: ≤50 mg/kg
Zn: ≤50 mg/kg

SMILES string

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

InChI

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

InChI key

UUHPPUWEDCVPCO-UHFFFAOYSA-N

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Caution

may contain black particles

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

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

Certificates of Analysis (COA)

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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.
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
Mark A Brzezinski et al.
Analytical chemistry, 78(17), 6109-6114 (2006-09-02)
A procedure for the automated determination of isotopic abundances of silicon from biogenic and lithogenic particulate matter and from dissolved silicon in fresh or saltwaters is reported. Samples are purified using proven procedures through the reaction of Si with acidified
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)]
S Nakabo et al.
Journal of oral rehabilitation, 29(7), 675-681 (2002-08-03)
Regulation of fluoride release from restorative resin or sealant is beneficial to patients as it will prevent the occurrence of the secondary caries. In this study, we evaluated whether or not the formation of a hydrophobic polysiloxane layer on the
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