Potassium azide
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| Potassium azide | ||
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| IUPAC name Potassium azide | ||
| Identifiers | ||
| CAS number | 20762-60-1 | |
| PubChem | 10996957 | |
| Jmol-3D images | {{#if:[N-]=[N+]=[N-].[K+]|Image 1 | |
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| Properties | ||
| Molecular formula | KN 3 | |
| 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 H 2O at 20 °C[1] | |
| Hazards | ||
| Main hazards | Very Toxic, explosive if strongly heated | |
| NFPA 704 |
 3
4
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 (77 °F), 100 kPa) | ||
| Infobox references | ||
Potassium azide is the chemical compound having the formula KN
3. 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]
Health hazards
Like sodium azide, potassium azide is a very toxic chemical due to inhibition of cytochrome c oxidase. It may be fatal if ingested, in contact with skin or if inhaled
References
- ↑ 1.0 1.1 1.2 1.3 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 KN
3". 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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