An arsinide, arsanide, dihydridoarsenate(1−) or arsanyl compound is a chemical derivative of arsine, where one hydrogen atom is replaced with a metal or cation.

[2] Arsinides are also formed when arsine reacts with thin layers of alkali metals.

Potassium dihydrogen arsinide KAsH2 reacts with alkyl halides to make trialkylarsine AsR3.

[5] Arsinides react with water to yield arsine AsH3: Potassium dihydrogen arsinide KAsH2 reacts with halobenzenes C6H5X, where X = Cl, Br, I (chlorobenzene C6H5Cl, bromobenzene C6H5Br, iodobenzene C6H5I) to produce benzene C6H6, tetraphenyldiarsine (C6H5)2As−As(C6H5)2 and triphenylarsine As(C6H5)3.

[7] Potassium dihydrogen arsinide KAsH2 reacts with a silyl halide, e.g. chlorosilane SiH3Cl, producing trisilylarsine.