lithium aluminium hydride
- CAS number
- 16853-85-3
- Molecular weight
- Molecular formula / chemical symbol
- LiAlH4
Description
LAH is a white solid, but commercial samples are usually gray due to contamination. This material can be purified by recrystallization from diethyl ether. Large-scale purifications employ a Soxhlet extractor. Commonly, the impure gray material is used in synthesis, since the impurities are innocuous and can be easily separated from the organic products. The pure powdered material is pyrophoric, but not its large crystals. Some commercial materials contain mineral oil to inhibit reactions with atmospheric moisture, but more commonly it is packed in moisture-proof plastic sacks.
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Lithium aluminium hydride |
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Preferred IUPAC name[hide] Lithium aluminium hydride |
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Systematic name[hide] Lithium alumanuide |
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Other names[hide] Lithal
Lithium alanate Lithium tetrahydridoaluminate(III) |
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Identifiers |
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Abbreviations |
LAH |
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16853-85-3 |
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26150 |
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BD0100000 |
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13167 |
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Jmol-3D images |
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Properties |
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LiAlH4 |
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37.95 g/mol |
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Appearance |
white crystals (pure samples) |
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odorless |
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0.917 g/cm3, solid |
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150 °C (423 K), decomposing |
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Solubility in water |
reactive |
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Structure |
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P21/c |
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Hazards[1] |
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DANGER |
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H260 |
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EU Index |
001-002-00-4 |
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Main hazards |
highly flammable |
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125 °C |
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Related compounds |
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Related hydride |
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USES
Carbonyl reagent.
Reductant.
The manufacture of other hydride and silane, borane.
Keyword:Biological medicine food