Used for the preparation of electrically conducting glasses.1,2 Used to make solutions for the separation of RNA from DNA by density gradient centrifugation.3
ChEBI: The inorganic chloride salt of caesium; each caesium ion is coordinated by eight chlorine ions.
It is soluble in H2O but can be purified by crystallisation from H2O [solublity in g percent: 162.3(0.7o), 182.2(16.2o) and 290(at bp 119.4o)] and dried in high a vacuum. It is soluble in EtOH and is deliquescent; keep it in a tightly closed container. [D.nges in Handbook of Preparative Inorganic Chemistry (Ed. Brauer) Academic Press Vol I pp 951-955 1963.] For further purification of CsCl, a concentrated aqueous solution of the practically pure reagent is treated with an equivalent weight of I2 and Cl2 is bubbled into the solution until preciptation of CsCl2I is complete. Recrystallisation yields a salt which is free from other alkali metals. It is then decomposed to pure CsCl on heating. [Harned & Schupp J Am Chem Soc 52 3886 1930.] It can also be recrystallised from acetone/water, or from water (0.5mL/g) by cooling in a CaCl2/ice bath. Dry it at 78o under vacuum.
Cesium chloride is used in radio and television vacuum tubes. It also is used in ultracentrifuge separations; x-ray fluorescent screens; as radiogrpahic contrast medium, and to prepare cesium and other cesium salts.
White cubic crystal; hygroscopic; density 3.99 g/cm3; melts at 645°C; vaporizes at 1297°C; very soluble in water, soluble in ethanol.
White/clear cryst. powder
For molecular genetic applications used in preparing nucleic acids for subsequent hybridization or cloning experiments
Cesium chloride is prepared by the treatment of cesium oxide or any cesium salt with hydrochloric acid followed by evaporation and crystallization of the solution.