Barium azide is an inorganic compound with the chemical formula Ba(N3)2 and is highly explosive. It has a white crystalline powder in appearance, odorless, with a density of 2.936 g/cm³ and a melting point of 120 °C. Barium azide is soluble in water, but insoluble in acetone and ether. At high temperatures, barium azide decomposes into nitrogen and barium nitride. Due to its high level of hazard, strict safety measures must be taken when operating.

Barium azide is a highly explosive inorganic compound, and its main uses are as follows:

1. Gunpowder and explosives: Barium azide is often used as a component of gunpowder and other explosives due to its ability to release large amounts of nitrogen gas when decomposing and enhance the power of explosions.

2. Degasser for lamps: As a highly efficient aeration agent, barium azide is used in the production of various incandescent lamps, such as general lighting lamps, infrared lamps, instrument lamps, photographic spotlights, photographic lights, and automobile, tractor, motorcycle lights, etc.

3. Chemical synthesis: In chemical synthesis, barium azide can be used to prepare azide acid and various other azide compounds, such as sodium azide, potassium azide, lithium azide, rubidium azide, zinc azide, etc.