Caesium and chlorine11/13/2023 In Brazil, such a source was stolen by scrap metal workers from a disused radiotherapy clinic, and serious injuries and deaths occurred as a result of external gamma exposure and internal exposure (the source was smashed open, releasing the water soluble caesium chloride). It is normal to use a thimble-shaped can of radioactive caesium chloride to provide the active source in a teletherapy type radiotherapy unit. As a result it is not possible with any of the insoluble caesium compounds to create the source. But for teletherapy sources, the radioactive density (Ci in a given volume) needs to be very high. For instance, radiothermal generators (RTGs) often use strontium titanate because it is insoluble in water. In the production of radioactive sources it is normal to choose a chemical form of the radioisotope which will not be dispersed with ease in the environment as a result of an accident where the source is smashed open. Cesium chlorideSupplier 3.3 Usage Caesium chloride is used in the preparation of electrically conducting glasses.Radioisotopes of caesium chloride are used in nuclear medicine, including treatment of cancer. It can also be recrystallised from acetone/water, or from water (0.5mL/g) by cooling in a CaCl2/ice bath. It is then decomposed to pure CsCl on heating. Recrystallisation yields a salt which is free from other alkali metals. 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. It is soluble in EtOH and is deliquescent keep it in a tightly closed container. 3.2 Purification Methods It is soluble in H2O but can be purified by crystallisation from H2O and dried in high a vacuum. 3.1 Definition ChEBI: The inorganic chloride salt of caesium each caesium ion is coordinated by eight chlorine ions.
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