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| Names | |
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| Other names
Barium dinitride
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| Identifiers | |
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3D model (JSmol)
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| ChemSpider | |
| ECHA InfoCard | 100.038.706 |
| EC Number |
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PubChem CID
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| UN number | 1687 |
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CompTox Dashboard (EPA)
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| Properties | |
| Ba(N3)2 | |
| Molar mass | 221.37 g/mol |
| Appearance | White crystalline solid |
| Odor | Odourless |
| Density | 2.936 g/cm3 |
| Melting point | 126 °C (259 °F; 399 K) |
| Boiling point | 160 °C (320 °F; 433 K) (initial decomposition) >217 °C (deflagrates) 180 °C (initial decomposition), 225 °C explosion |
| 11.5 g/100 mL (0 °C) 14.98 g/100 mL (15.7 °C) 15.36 g/100 mL (20 °C) 22.73 g/100 mL (52.1 °C) 24.75 g/100 mL (70 °C) |
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| Solubility in ethanol | 0.017 g/100 mL (16 °C) |
| Solubility in acetone | Insoluble |
| Solubility in ether | Insoluble |
| Structure | |
| Monoclinic | |
| Hazards | |
| GHS labelling: | |
 
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| Danger | |
| H200, H301, H315, H319, H331, H335 | |
| P210, P240, P264, P280, P305+P351+P338, P310 | |
| Safety data sheet (SDS) | [1] |
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Barium azide is an inorganic azide with the formula Ba(N3)2. It is a barium salt of hydrazoic acid. Like most azides, it is explosive. It is less sensitive to mechanical shock than lead azide.
Preparation
Barium azide may be prepared by reacting sodium azide with a soluble barium salt. Care should be taken to prevent large crystals from forming in the solution as barium azide crystals will explode if subjected to friction/shock or if fully dried. The product should be stored submerged in ethanol.
Uses
Barium azide can be used to make azides of magnesium, sodium, potassium, lithium, rubidium and zinc with their respective sulfates.
- Ba(N3)2 + Li2SO4 → 2 LiN3 + BaSO4
It can also be used as a source for high purity nitrogen by heating:
- Ba(N3)2 → Ba + 3 N2
This reaction liberates metallic barium, which is used as a getter in vacuum applications.