Ammonium pentaborate

Ammonium pentaborate

Names
IUPAC name azanium;(7-oxido-2,4,6,8,9-pentaoxa-1,3,5,7-tetraborabicyclo[3.3.1]nonan-3-yl)oxy-oxoborane
Identifiers
CAS Number	12007-89-5  Y tetrahydrate: 12046-04-7 octahydrate: 12046-03-6
3D model (JSmol)	Interactive image tetrahydrate: Interactive image octahydrate: Interactive image
ChemSpider	52085560
EC Number	234-521-1
PubChem CID	131634794
UNII	E9ND2KN062
InChI InChI=1S/B5O8.H3N/c6-1-8-3-11-4-9-2(7)10-5(12-3)13-4;/h;1H3/q-1;/p+1 Key: OEAWHXRHGIIPBU-UHFFFAOYSA-O
SMILES B(=O)OB1OB2OB(OB(O2)O1)[O-].[NH4+] tetrahydrate:B(=O)OB1OB2OB(OB(O2)O1)[O-].[NH4+].O.O.O.O octahydrate:B(=O)OB1OB2OB(OB(O2)O1)[O-].[NH4+].O.O.O.O.O.O.O.O
Properties
Chemical formula	B5H4NO8
Molar mass	200.08 g·mol−1
Appearance	white crystals
Density	g/cm3 (hydrate)
Solubility in water	soluble
Hazards
GHS labelling:
Pictograms
Signal word	Warning
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Ammonium pentaborate is a chemical compound with the chemical formula NH₄B₅O₈. ^{[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 H₄N · B₅O₈· 4H₂O ^[6] and an octahydrate H₄N · B₅O₈· 8H₂O. ^[7]

Uses

The compound is used to inhibit heat, flame, and corrosion in a variety of industrial applications. ^[8]

References

1. Cheremisinoff, Nicholas P.; Davletshina, Tatyana A. (22 October 2013). Fire and Explosion Hazards Handbook of Industrial Chemicals. Elsevier. p. 22. ISBN   978-0-8155-1719-1 . Retrieved 28 February 2025.
2. 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 117325. doi:10.1016/j.jlumin.2020.117325. ISSN   0022-2313 . Retrieved 28 February 2025.
3. Morgan, Alexander B. (16 November 2021). Non-halogenated Flame Retardant Handbook. John Wiley & Sons. p. 246. ISBN   978-1-119-75206-6 . Retrieved 28 February 2025.
4. Kirk-Othmer Concise Encyclopedia of Chemical Technology, 2 Volume Set. John Wiley & Sons. 16 July 2007. p. 320. ISBN   978-0-470-04748-4 . Retrieved 28 February 2025.
5. "Ammonium Pentaborate | CAMEO Chemicals | NOAA". cameochemicals.noaa.gov. Retrieved 28 February 2025.
6. "Ammonium pentaborate tetrahydrate". Sigma Aldrich . Retrieved 28 February 2025.
7. "Ammonium pentaborate octahydrate". Sigma Aldrich . Retrieved 28 February 2025.
8. "Ammonium Pentaborate" . Retrieved 28 February 2025.