Caesium perchlorate

Caesium perchlorate ^{[1] [2]}

Names
IUPAC name Caesium perchlorate
Other names Cesium perchlorate
Identifiers
CAS Number	13454-84-7  Y
3D model (JSmol)	Interactive image
ChemSpider	109912  Y
ECHA InfoCard	100.033.298
EC Number	236-643-0
PubChem CID	123309
CompTox Dashboard (EPA)	DTXSID50884610
InChI InChI=1S/ClHO4.Cs/c2-1(3,4)5;/h(H,2,3,4,5);/q;+1/p-1 Y Key: WKDKOOITVYKILI-UHFFFAOYSA-M Y InChI=1/ClHO4.Cs/c2-1(3,4)5;/h(H,2,3,4,5);/q;+1/p-1 Key: WKDKOOITVYKILI-REWHXWOFAB
SMILES [Cs+].[O-]Cl(=O)(=O)=O
Properties
Chemical formula	CsClO4
Molar mass	232.36 g/mol
Appearance	Colorless crystals
Density	3.327 g/cm3
Melting point	250 °C (482 °F; 523 K) (decomposes)
Solubility in water	1.974 g/100 ml (25 °C)
Solubility product (Ksp)	3.95×10−3 [3]
Refractive index (nD)	1.4887
Structure
Crystal structure	orthorhombic (<219 °C) cubic (>219 °C, a = 798 pm)
Space group	Pnma (<219 °C) F43m (>219 °C)
Lattice constant	a = 982 pm, b = 600 pm, c = 779 pm (orthorhombic, <219 °C)
Hazards
GHS labelling: [4]
Pictograms
Signal word	Danger
Hazard statements	H271, H272, H302, H315, H319, H332, H335
Precautionary statements	P210, P220, P261, P264, P264+P265, P270, P271, P280, P283, P301+P317, P302+P352, P304+P340, P305+P351+P338, P306+P360, P317, P319, P321, P330, P332+P317, P337+P317, P362+P364, P370+P378, P371+P380+P375, P403+P233, P405, P420, P501
Flash point	Non-flammable
Safety data sheet (SDS)	External MSDS
Related compounds
Other anions	Caesium chloride Caesium chlorate
Other cations	Lithium perchlorate Sodium perchlorate Potassium perchlorate Rubidium perchlorate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Y  verify  (what is  YN ?) Infobox references

Caesium perchlorate or cesium perchlorate (CsClO₄), is a perchlorate of caesium. It forms white crystals, which are sparingly soluble in cold water and ethanol. It dissolves more easily in hot water.

CsClO₄ is the second least soluble of the alkali metal perchlorates (after Fr, followed by Rb, K, Li, and Na), a property which may be used for separatory purposes and even for gravimetric analysis. ^[5] This low solubility played an important role in the characterization of francium as an alkali metal, as francium perchlorate coprecipitates with caesium perchlorate. ^[6]

Table of solubility in water ^{[1] [2]}

Temperature (°C)	0	8.5	14	25	40	50	60	70	99
Solubility (g / 100 ml)	0.8	0.91	1.91	1.974	3.694	5.47	7.30	9.79	28.57

When heated, CsClO₄ decomposes to caesium chloride above 250 °C. Like all perchlorates, it is a strong oxidant and may react violently with reducing agents and organic materials, especially at elevated temperatures.

References

1. Perry, Dale L.; Phillips, Sidney L. (1995), Handbook of Inorganic Compounds, CRC Press.
2. Brezina, F.; Mollin, J.; Pastorek, R.; Sindelar, Z. (1986), Chemicke tabulky anorganickych sloucenin, SNTL.
3. John Rumble (June 18, 2018). CRC Handbook of Chemistry and Physics (99 ed.). CRC Press. pp. 5–188. ISBN   978-1138561632.
4. PubChem. "Cesium perchlorate". pubchem.ncbi.nlm.nih.gov. Retrieved 2026-01-18.
5. Greenwood, Norman N.; Earnshaw, Alan (1984). Chemistry of the Elements. Oxford: Pergamon Press. p. 1017. ISBN   978-0-08-022057-4..
6. Hyde, E. K. (1952), "Radiochemical Methods for the Isolation of Element 87 (Francium)", J. Am. Chem. Soc., 74 (16): 4181–84, doi:10.1021/ja01136a066, hdl: 2027/mdp.39015086483156