Ammonium selenide is a chemical compound with the symbol (NH4)2Se.

It is claimed to be a white solid and there is little to no spectroscopic evidence on this compound.

[1][2] It was first claimed to be prepared in 1898 by reacting concentrated ammonia and hydrogen selenide gas.

[1] However, this has been disproved in 1926 as it was shown that ammonium selenide was unstable in water.

[3] It also reacts with various metals, such as calcium, to produce their respective selenides.