Potassium azide
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Potassium azide
| Potassium azide | |
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Potassium azide |
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| Identifiers | |
| CAS number | 20762-60-1 |
| PubChem | 10996957 |
| Jmol-3D images | Image 1 |
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| Properties | |
| Molecular formula | KN3 |
| Molar mass | 81.1184 g/mol |
| Appearance | Colorless crystals[1] |
| Density | 2.04 g/cm3 [1] |
| Melting point |
350 °C (in vacuum)[1] |
| Boiling point |
decomposes |
| Solubility in water | 50.8 g/100g H2O at 20 °C[1] |
| Hazards | |
| Main hazards | Toxic, explosive if strongly heated |
| NFPA 704 |
 3
3
3
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| Related compounds | |
| Other cations | Sodium azide, copper(II) azide, lead(II) azide, silver azide |
 (verify) (what is:  / ?)Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) |
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| Infobox references | |
Potassium azide is the chemical compound having the formula KN3. It is the potassium salt of hydrazoic acid, and crystallizes in a tetragonal structure.[2] Upon heating or irradiation with ultraviolet light, it decomposes into potassium metal and nitrogen gas.[3][4] Unlike heavy-metal azides, it is not sensitive to shock, but may explode if heated rapidly.[5]
It has been found to act as a nitrification inhibitor in soil.[6]
References
- ^ a b c d Dale L. Perry; Sidney L. Phillips (1995). Handbook of inorganic compounds. CRC Press. p. 301. ISBN 0-8493-8671-3.
- ^ Khilji, M. Y.; Sherman, W. F.; Wilkinson, G. R. (1982). "Variable temperature and pressure Raman spectra of potassium azide KN3". Journal of Raman Spectroscopy 12 (3): 300–303. Bibcode 1982JRSp...12..300K. doi:10.1002/jrs.1250120319.
- ^ Tompkins, F. C.; Young, D. A. (1982). "The Photochemical and Thermal Formation of Colour Centres in Potassium Azide Crystals". Proceedings of the Royal Society of London. Series A, Mathematical and Physical Sciences 236 (1204): 10–23.
- ^ Pradyot Patnaik (2003). Handbook of inorganic chemicals. McGraw-Hill Professional. p. 734. ISBN 0-07-049439-8.
- ^ Pradyot Patnaik (2007). A comprehensive guide to the hazardous properties of chemical substances (3rd ed.). Wiley-Interscience. p. 615. ISBN 0-471-71458-5.
- ^ T. D. Hughes; L. F. Welch (1970). "Potassium Azide as a Nitrification Inhibitor". Agronomy Journal (American Society of Agronomy) 62: 595–599.
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