Sodium hexafluoroaluminate
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Sodium hexafluoroaluminate is an inorganic compound with formula Na3AlF6. This white solid, discovered in 1799 by Peder Christian Abildgaard (1740–1801),[4][5] occurs naturally as the mineral cryolite and is used extensively in the industrial production of aluminium. The compound is the sodium (Na+) salt of the hexafluoroaluminate (AlF63−) ion.
Quick Facts Names, Identifiers ...
Names | |
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Other names
Sodium fluoroaluminate Cryolite Kryolite Aluminate(3-), hexafluoro-, trisodium, (OC-6-11)- | |
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Properties | |
Na3AlF6 | |
Molar mass | 209.94 g/mol |
Appearance | white solid |
Density | 2.9 g/cm3, solid |
Melting point | 950 °C (1,740 °F; 1,220 K) |
Boiling point | decomposes |
0.04% (20°C)[1] | |
Vapor pressure | essentially 0 |
Hazards | |
GHS labelling:[2] | |
Danger | |
H332, H372, H411 | |
P260 | |
Lethal dose or concentration (LD, LC): | |
LDLo (lowest published) |
600 mg/kg (guinea pigs, oral)[3] |
NIOSH (US health exposure limits): | |
PEL (Permissible) |
TWA 2.5 mg/m3[1] |
REL (Recommended) |
TWA 2.5 mg/m3[1] |
IDLH (Immediate danger) |
250 mg/m3 (as F)[1] |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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