Unit cell of sodium hexafluoridosilicate
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Names | |
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Preferred IUPAC name
Sodium fluorosilicate | |
Systematic IUPAC name
Sodium hexafluoridosilicate(2–)
[1] | |
Other names
Disodium hexafluorosilicate/sodium fluosilicate/sodium silicofluoride
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Identifiers | |
3D model (JSmol)
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ChemSpider | |
ECHA InfoCard | 100.037.198 |
EC Number |
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PubChem CID
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RTECS number |
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UNII | |
UN number | 2674 |
CompTox Dashboard (EPA)
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Properties | |
Na2[SiF6] | |
Molar mass | 188 g/mol |
Appearance | white granular powder |
Odor | odorless |
Density | 2.7 g/cm3 |
0.64 g/100 mL (20 °C) 1.27 g/100 mL (50 °C) 2.45 g/100 mL (100 °C) | |
Solubility | insoluble in alcohol |
Refractive index (nD)
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1.312 |
Structure[2] | |
trigonal | |
P321 | |
a = 8.859, c = 5.038
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Formula units (Z)
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4 |
Hazards | |
NFPA 704 (fire diamond) | |
Lethal dose or concentration (LD, LC): | |
LDLo (lowest published)
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70 mg/kg (mouse, oral) 125 mg/kg (rabbit, oral)[3] |
Related compounds | |
Other cations
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Ammonium hexafluorosilicate |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Sodium fluorosilicate is a compound with the chemical formula Na2[SiF6]. Unlike other sodium salts, it has a low solubility in water.
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: CS1 maint: multiple names: authors list (link)