However, aluminium arsenide crystals prepared by these methods are generally unstable and generate arsine (AsH3) when exposed to moist air.

It may also cause chronic arsenic poisoning, ulceration of the nasal septum, liver damage and cancer/diseases of the blood, kidneys and nervous system.

Chronic implications from ingestion include arsenic poisoning, gastrointestinal disturbances, liver damage, and cancer/disease of the blood, kidneys and nervous system.

[8][page needed] Precautions to be taken in handling and storage: Store in a cool, dry place in tightly sealed containers.

AlAs reacts on contact with acids or moisture to give a host of volatile, highly toxic arsenic compounds such as Arsine.