Sodium aluminium hydride

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Sodium aluminium hydride
Names
IUPAC name
Sodium aluminium hydride
Other names
Aluminum sodium hydride
Sodium alanate
Sodium tetrahydroaluminate
Properties
NaAlH4
Molar mass 54.003 g/mol
Appearance White crystalline solid
Odor Odorless
Density 1.24 g/cm3
Melting point 183 °C (361 °F; 456 K) (decomposes)
Boiling point Decomposes
Reacts
Solubility Reacts with alcohols, carboxylic acids, halocarbons
Soluble in diglyme
Insoluble in diethyl ether, hydrocarbons
Solubility in tetrahydrofuran 16 g/100 ml
Vapor pressure ~0 mmHg
Thermochemistry
89.12 J·mol-1·K-1
-117.04 kJ/mol
Hazards
Safety data sheet Sigma-Aldrich
Related compounds
Related compounds
Lithium aluminium hydride
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Sodium aluminium hydride, also known as sodium alanate is an white pyrophoric solid, with the chemical formula NaAlH4.

Properties

Chemical

Sodium aluminium hydride reacts with water, releasing hydrogen gas.

NaAlH4 + 4 H2O → NaAl(OH)4 + 4 H2

Physical

Sodium aluminium hydride is a white solid, which reacts with water, but is soluble in THF.

Availability

Sodium aluminium hydride is sold by chemical suppliers, though it's not easy to get hold of.

Preparation

Sodium aluminium hydride can be synthesized by reacting powdered sodium hydride and aluminium with hydrogen at 200 °C under high pressure (<100 atm). A catalyst, like triethylaluminium is used.

Projects

Handling

Safety

Sodium aluminium hydride is corrosive, caustic and pyrophoric.

Storage

In air tight containers.

Disposal

Can be safely neutralized by slowly and carefully adding it in large amounts of water or an alcohol. Neutralization should be done outside.

References

Relevant Sciencemadness threads