Caesium phosphate

Caesium phosphate

Names
IUPAC name Caesium phosphate
Other names Cesium phosphate
Identifiers
CAS Number	17893-64-0
3D model (JSmol)	Interactive image
ChemSpider	8002785
EC Number	627-052-2
PubChem CID	9827043
CompTox Dashboard (EPA)	DTXSID80431378
InChI InChI=1S/3Cs.H3O4P/c;;;1-5(2,3)4/h;;;(H3,1,2,3,4)/q3*+1;/p-3 Key: CPWJKGIJFGMVPL-UHFFFAOYSA-K
SMILES [O-]P(=O)([O-])[O-].[Cs+].[Cs+].[Cs+]
Properties
Chemical formula	Cs3PO4
Molar mass	493.69 g/mol
Hazards
GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H315, H317, H319, H335
Precautionary statements	P261, P264, P271, P280, P302+P352, P304+P340, P305+P351+P338, P312, P321, P332+P313, P337+P313, P362, P403+P233, P405, P501
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Caesium phosphate, Cs₃PO₄, is a phosphate of caesium ^[1] that is highly soluble in water.

Use

Caesium phosphate can be used as an n-dopant to enhance the conductivity of the electron transport layer in organic light-emitting diodes. ^[2]

Related compounds

Several caesium hydrogen phosphates (Cs_xH_y(PO₄)_z·nH₂O) have been characterized. ^{[3] [4]}

Several mixed phosphates such as caesium–manganese phosphate (CsMnPO₄), ^[5] caesium–cobalt phosphate (CsCoPO₄), ^[6] and caesium–magnesium phosphate (CsMgPO₄) ^[7] also exist.

References

1. "Cesium phosphate". PubChem. Retrieved 29 May 2025.
2. Wemken, Jan Hauke; Krause, Ralf; Mikolajick, Thomas; Schmid, Günter (2012-04-01). "Low-cost caesium phosphate as n-dopant for organic light-emitting diodes". Journal of Applied Physics. 111 (7). doi:10.1063/1.3699008. ISSN   0021-8979.
3. Ponomareva, V.; Bagryantseva, I.; Zakharov, B.; Bulina, N.; Lavrova, G.; Boldyreva, E. (2017-10-01). "Crystal structure and proton conductivity of a new Cs3(H2PO4)(HPO4)·2H2O phase in the caesium di- and mono hydrogen orthophosphate system". Acta Crystallographica Section C: Structural Chemistry. 73 (10): 773–779. doi:10.1107/S2053229617012335. ISSN   2053-2296.
4. Weil, Matthias; Stöger, Berthold (2020-09-01). "The caesium phosphates Cs3(H1.5PO4)2(H2O)2, Cs3(H1.5PO4)2, Cs4P2O7(H2O)4, and CsPO3". Monatshefte für Chemie - Chemical Monthly. 151 (9): 1317–1328. doi:10.1007/s00706-020-02675-6. ISSN   1434-4475.
5. Korchemkin, I. V.; Pet’kov, V. I.; Markin, A. V.; Smirnova, N. N.; Kovalsky, A. M.; Efimov, N. N.; Novotortsev, V. M. (2014-11-01). "Thermodynamic properties of caesium–manganese phosphate CsMnPO4". The Journal of Chemical Thermodynamics. 78: 114–119. doi:10.1016/j.jct.2014.06.012. ISSN   0021-9614.
6. Korchemkin, I. V.; Pet’kov, V. I.; Markin, A. V.; Smirnova, N. N.; Kovalskii, A. M. (2016-05-01). "Thermodynamic properties of caesium–cobalt phosphate CsCoPO4". The Journal of Chemical Thermodynamics. 96: 34–40. doi:10.1016/j.jct.2015.12.017. ISSN   0021-9614.
7. Asabina, E. A.; Zaripov, A. R.; Pet’kov, V. I.; Markin, A. V.; Kir’yanov, K. V.; Smirnova, N. N.; Rovny, S. I. (2008-04-01). "Thermodynamic properties of caesium–magnesium monophosphate". The Journal of Chemical Thermodynamics. 40 (4): 653–660. doi:10.1016/j.jct.2007.11.001. ISSN   0021-9614.