Chemistry:Ammonium bromate
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| Properties | |
| BrH4NO3 | |
| Molar mass | 145.940 g·mol−1 |
| Density | g/cm3 |
| soluble | |
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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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Ammonium bromate is a chemical compound with the chemical formula NH
4BrO
3.[1]
Synthesis
Ammonium bromate can be made by draining cold solutions of ammonium chloride and sodium bromate:
- NH
4Cl + NaBrO
3 → NH
4BrO
3 + NaCl
- NH
Physical properties
Ammonium bromate forms colorless crystals, soluble in water, but poorly soluble in ethanol.[2][3]
It is highly explosive.
Chemical properties
Ammonium bromate is a very unstable compound that slowly decomposes at −5 °C and explodes at 54 °C. The decomposition proceeds as follows:[4][5]
- NH
4BrO
3 → NH
4NO
3 + 2 Br
2 + O
2 + N
2O + 6 H
2O - NH
4BrO
3 → N
2 + Br
2 + O
2 + 4 H
2O
- NH
It also decomposes significantly when stored in a desiccator containing calcium chloride, changing color to yellow and then reddish brown.
References
- ↑ Urben, Peter (18 March 2017) (in en). Bretherick's Handbook of Reactive Chemical Hazards. Elsevier. p. 1328. ISBN 978-0-08-101059-4. https://books.google.com/books?id=rnXUDAAAQBAJ&dq=Ammonium+bromate&pg=PA1328. Retrieved 30 January 2025.
- ↑ Watts, Henry (1866) (in en). A Dictionary of Chemistry and the Allied Branches of Other Sciences: Abichite. Longmans, Green, and Company. p. 670. https://books.google.com/books?id=i3oPAQAAIAAJ&dq=Ammonium+bromate&pg=PA670. Retrieved 30 January 2025.
- ↑ Haynes, William M. (22 June 2016) (in en). CRC Handbook of Chemistry and Physics. CRC Press. p. 4-46. ISBN 978-1-4987-5429-3. https://books.google.com/books?id=VVezDAAAQBAJ&dq=Ammonium+bromate&pg=SA4-PA46. Retrieved 30 January 2025.
- ↑ Solymosi, Frigyes; Bansagi, Tamas (1 January 1970). "Stability of ammonium halates in the solid state. Kinetics and mechanism of the thermal decomposition of ammonium bromate". The Journal of Physical Chemistry 74 (1): 15–21. doi:10.1021/j100696a003. ISSN 0022-3654. https://pubs.acs.org/doi/abs/10.1021/j100696a003. Retrieved 30 January 2025.
- ↑ Galwey, A. K.; Brown, M. E. (25 February 1999) (in en). Thermal Decomposition of Ionic Solids: Chemical Properties and Reactivities of Ionic Crystalline Phases. Elsevier. p. 423. ISBN 978-0-08-054279-9. https://books.google.com/books?id=i9nyvTYBQtAC&dq=Ammonium+bromate&pg=PA574. Retrieved 30 January 2025.
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