Caesium azide
| Names | |
|---|---|
| IUPAC name
Caesium azide
| |
| Other names
Cesium azide
| |
| Properties | |
| CsN3 | |
| Molar mass | 174.926 g/mol |
| Appearance | White deliquescent solid |
| Odor | Odorless |
| Density | 3.5 g/cm3 |
| Melting point | 310 °C (590 °F; 583 K) [1] |
| Boiling point | Decomposes |
| 224.2 g/100 ml (0 °C) 307.4 g/100 ml (16 °C) | |
| Solubility | Insoluble in diethyl ether |
| Solubility in ethanol | 1.0366 g/100 ml (16 °C) |
| Vapor pressure | ~0 mmHg |
| Thermochemistry | |
| Std molar
entropy (S |
134 J·mol−1·K−1 |
| Std enthalpy of
formation (ΔfH |
-19.6 kJ/mol |
| Hazards | |
| Safety data sheet | Sigma-Aldrich |
| Related compounds | |
| Related compounds
|
Lithium azide Sodium azide Potassium azide Rubidium azide |
| Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
| Infobox references | |
Caesium azide or cesium azide is an inorganic compound of caesium and azide with the formula CsN3.
Contents
Properties
Chemical
Thermal decomposition of caesium azide yields caesium metal and nitrogen gas.
Physical
Caesium azide is a white deliquescent solid, very soluble in water.
Explosive
Unlike other azides, caesium azide is not sensitive to mechanical shock.
Availability
Caesium azide is sold by chemical suppliers, but due to the high toxicity of azides, it's not readily available for the amateur chemist. It is also very expensive.
Preparation
Can be prepared by neutralizing caesium hydroxide or carbonate with hydrazoic acid.
More conveniently, it can be prepared by double replacement of barium azide and caesium sulfate.[2]
Projects
- Make caesium metal
Handling
Safety
Caesium azide is extremely toxic. The toxicity of azides is similar that of cyanides. There is no known antidote.
Storage
Caesium azide should be stored in spark-free containers, away from moisture or any acidic vapors.
Disposal
When disposed of, it must never be poured down the drain, as it will react to either copper or lead plumbing to yield copper azide, which is highly sensitive. Hydrolysis can also occur in aqueous solutions, at certain pH. Caesium azide must be treated with nitrous acid before being discarded. The caesium ions should be recycled.
References
- ↑ Liew, Li-Anne; Moreland, John; Gerginov, Vladislav; Applied Physics Letters; vol. 90; nb. 11; (2007); Art.No: 114106
- ↑ Curtius, Th.; Rissom, J.; Journal fur praktische Chemie (Leipzig 1954); vol. 58; (1898); p. 282 - 282
