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Merck
CN

204331

Ammonium hexafluorosilicate

99.999% trace metals basis

Synonym(s):

Cryptohalite

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About This Item

Linear Formula:
(NH4)2SiF6
CAS Number:
16919-19-0
Molecular Weight:
178.15
NACRES:
NA.23
PubChem Substance ID:
24852255
UNSPSC Code:
12352302
EC Number:
240-968-3
MDL number:
MFCD00010887
Assay:
99.999% trace metals basis
Form:
solid

Key Documents

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InChI key

ITHIMUMYFVCXSL-UHFFFAOYSA-P

InChI

1S/F6Si.2H3N/c1-7(2,3,4,5)6;;/h;2*1H3/q-2;;/p+2

SMILES string

[H][N+]([H])([H])[H].[H][N+]([H])([H])[H].F[Si--](F)(F)(F)(F)F

assay

99.999% trace metals basis

form

solid

impurities

≤15.0 ppm Trace Metal Analysis

density

2.01 g/mL at 25 °C (lit.)

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pictograms

Skull and crossbones
GHS06

signalword

Danger

Hazard Classifications

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

Storage Class

6.1C - Combustible acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects

wgk

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Faceshields, Gloves, type P2 (EN 143) respirator cartridges

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Certificates of Analysis (COA)

Lot/Batch Number
MKCN8517
MKCL3935
MKCK6762
MKCJ4622
MKCJ4623

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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.
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
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)]
[Recurrent ventricular fibrillation in magnesium fluosilicate poisoning].
B Suberviola Cañas et al.
Medicina intensiva, 31(6), 344-346 (2007-08-01)
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.
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