Chemistry:Ammonium pentaborate
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| IUPAC name
azanium;(7-oxido-2,4,6,8,9-pentaoxa-1,3,5,7-tetraborabicyclo[3.3.1]nonan-3-yl)oxy-oxoborane
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| Properties | |
| B5H4NO8 | |
| Molar mass | 200.08 g·mol−1 |
| Appearance | white crystals |
| Density | g/cm3 (hydrate) |
| soluble | |
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| GHS Signal word | Warning |
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 pentaborate is a chemical compound with the chemical formula NH
4B
5O
8.[1][2]
Synthesis
The compound can be prepared by a controlled reaction of ammonia, boric acid, and water.[3][4]
Physical properties
The compound forms white crystals soluble in water.[5]
Ammonium pentaborate forms a tetrahydrate H
4N · B
5O
8 · 4H
2O[6] and an octahydrate H
4N · B
5O
8 · 8H
2O.[7]
Uses
The compound is used to inhibit heat, flame, and corrosion in a variety of industrial applications.[8]
References
- ↑ Cheremisinoff, Nicholas P.; Davletshina, Tatyana A. (22 October 2013) (in en). Fire and Explosion Hazards Handbook of Industrial Chemicals. Elsevier. p. 22. ISBN 978-0-8155-1719-1. https://books.google.com/books?id=qlemZFVYjZQC&dq=ammonium+pentaborate&pg=PA22. Retrieved 28 February 2025.
- ↑ Song, Yuxiang; Wang, Junpeng; Chen, Ling; Yang, Ping (1 September 2020). "Ammonium pentaborate crystals with adjustable and bright phosphorescence and long lifetime". Journal of Luminescence 225. doi:10.1016/j.jlumin.2020.117325. ISSN 0022-2313. https://www.sciencedirect.com/science/article/abs/pii/S002223132030507X. Retrieved 28 February 2025.
- ↑ Morgan, Alexander B. (16 November 2021) (in en). Non-halogenated Flame Retardant Handbook. John Wiley & Sons. p. 246. ISBN 978-1-119-75206-6. https://books.google.com/books?id=MFNPEAAAQBAJ&dq=ammonium+pentaborate&pg=PA246. Retrieved 28 February 2025.
- ↑ (in en) Kirk-Othmer Concise Encyclopedia of Chemical Technology, 2 Volume Set. John Wiley & Sons. 16 July 2007. p. 320. ISBN 978-0-470-04748-4. https://books.google.com/books?id=BYQfEAAAQBAJ&dq=Ammonium+pentaborate+-+reaction+equation&pg=PA320. Retrieved 28 February 2025.
- ↑ "Ammonium Pentaborate | CAMEO Chemicals | NOAA". cameochemicals.noaa.gov. https://cameochemicals.noaa.gov/chemical/8258.
- ↑ "Ammonium pentaborate tetrahydrate". Sigma Aldrich. https://www.sigmaaldrich.com/RU/en/product/aldrich/a4505.
- ↑ "Ammonium pentaborate octahydrate". Sigma Aldrich. https://www.sigmaaldrich.com/RU/en/product/aldrich/906034.
- ↑ "Ammonium Pentaborate". https://www.borax.com/products/ammonium-pentaborate.
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