Aluminium Selenide Granule - Al2Se3

It is a solid prepared by igniting a mixture of the elements at 1,000 °C (1,830 °F)，The pure compound is white, but typical samples are coloured. Samples of aluminium selenide must be protected from moisture, because the compound hydrolyzes readily, giving off highly toxic hydrogen selenide gas。

It is a solid prepared by igniting a mixture of the elements at 1,000 °C (1,830 °F):

2 Al + 3 Se → Al2Se3

The pure compound is white, but typical samples are coloured.[3] Samples of aluminium selenide must be protected from moisture, because the compound hydrolyzes readily, giving off highly toxic hydrogen selenide gas:[4]

Al2Se3 + 3 H2O → Al2O3 + 3 H2Se

Al2Se3 has been used as a precursor to hydrogen selenide, which is released when the solid is treated with acids.Aluminium selenide should be stored and handled away from moisture and air.