Caesium perchlorate

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title: "Caesium perchlorate" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["caesium-compounds", "perchlorates"] topic_path: "general/caesium-compounds" source: "https://en.wikipedia.org/wiki/Caesium_perchlorate" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

| Watchedfields = changed | verifiedrevid = 443114551 | Reference = | ImageFile = cesium perchlorate.png | ImageSize = 150px | ImageFile1 = Cesium perchlorate 25g.jpg | IUPACName = Caesium perchlorate | OtherNames = Cesium perchlorate |Section1={{Chembox Identifiers | InChI = 1/ClHO4.Cs/c2-1(3,4)5;/h(H,2,3,4,5);/q;+1/p-1 | SMILES = [Cs+].[O-]Cl(=O)(=O)=O | InChIKey = WKDKOOITVYKILI-REWHXWOFAB | StdInChI_Ref = | StdInChI = 1S/ClHO4.Cs/c2-1(3,4)5;/h(H,2,3,4,5);/q;+1/p-1 | StdInChIKey_Ref = | StdInChIKey = WKDKOOITVYKILI-UHFFFAOYSA-M | CASNo_Ref = | CASNo = 13454-84-7 | EINECS = 236-643-0 | ChemSpiderID_Ref = | ChemSpiderID = 109912 | PubChem = 123309 |Section2={{Chembox Properties | Formula = CsClO4 | MolarMass = 232.36 g/mol | Appearance = Colorless crystals | Density = 3.327 g/cm3 | MeltingPtC = 250 | MeltingPt_notes = (decomposes) | Solubility = 1.974 g/100 ml (25 °C) | SolubilityProduct = 3.95 | RefractIndex = 1.4887 |Section3={{Chembox Structure | CrystalStruct = orthorhombic (219 °C, a = 798 pm) | SpaceGroup = Pnma (219 °C) | LattConst_a = 982 pm | LattConst_b = 600 pm | LattConst_c = 779 pm (orthorhombic, | Coordination = |Section7={{Chembox Hazards | ExternalSDS = External MSDS | FlashPt = Non-flammable | GHS_ref = | GHSPictograms = | GHSSignalWord = Danger | HPhrases = | PPhrases = |Section8={{Chembox Related | OtherAnions = Caesium chloride Caesium chlorate | OtherCations = Lithium perchlorate Sodium perchlorate Potassium perchlorate Rubidium perchlorate

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. This low solubility played an important role in the characterization of francium as an alkali metal, as francium perchlorate coprecipitates with caesium perchlorate.

::data[format=table title="Table of solubility in water"]

Temperature (°C)Solubility (g / 100 ml)
08.5
0.80.91
::

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

References

  1. (1995). "Handbook of Inorganic Compounds". CRC Press.
  2. (1986). "Chemicke tabulky anorganickych sloucenin". SNTL.
  3. (June 18, 2018). "CRC Handbook of Chemistry and Physics". CRC Press.
  4. PubChem. "Cesium perchlorate".
  5. {{Greenwood&Earnshaw1st
  6. Hyde, E. K.. (1952). "Radiochemical Methods for the Isolation of Element 87 (Francium)". J. Am. Chem. Soc..

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caesium-compoundsperchlorates