Cesium iodide

Cesium iodide Basic information
Description References
Product Name:Cesium iodide
Synonyms:Cesium iodide, 99.9%, for analysis;Cesium iodide, for analysis;Cesium Iodide (Metals Basis);Cesium iodide/ 99.99%;CESIUM IODIDE, 99.7%;tricesiumtriiodide;CESIUM IODIDE;CESIUM IODINE
CAS:7789-17-5
MF:CsI
MW:259.81
EINECS:232-145-2
Product Categories:Cesium;Cesium Salts;Crystal Grade Inorganics;Cs;Materials Science;Metal and Ceramic Science;Crystal Grade Inorganics;Metal and Ceramic Science;Salts;Alphabetic;C;CA - CGAnalytical Standards;MS MarkersPhysical Properties;Ultra-High Purity Materials;Cesium Salts;CesiumMetal and Ceramic Science;MS Standards;Single Compounds;Spectroscopy;Electronic Materials;Materials Science;Micro/Nanoelectronics;metal halide;bc0001
Mol File:7789-17-5.mol
Cesium iodide Structure
Cesium iodide Chemical Properties
Melting point 626 °C (lit.)
Boiling point 1280 °C
density 4.51 g/mL at 25 °C (lit.)
refractive index 1.7876
Fp 1280°C
storage temp. Keep in dark place,Inert atmosphere,Room temperature
form beads
Specific Gravity4.51
color White
PHpH(50g/l, 25℃) : 5.0~9.0
Water Solubility 74 g/100 mL (20 ºC)
Sensitive Hygroscopic
Merck 14,2014
Exposure limitsACGIH: TWA 0.01 ppm
Stability:Stable. Deliquescent.
CAS DataBase Reference7789-17-5(CAS DataBase Reference)
NIST Chemistry ReferenceCesium iodide(7789-17-5)
EPA Substance Registry SystemCesium iodide (CsI) (7789-17-5)
Safety Information
Hazard Codes Xn,Xi
Risk Statements 36/37/38-42/43-43
Safety Statements 22-36/37-45
RIDADR UN 3077 9 / PGIII
WGK Germany 2
RTECS FL0350000
8
TSCA Yes
HS Code 28276000
ToxicityLD50 i.p. in rats: 1.4 g/kg (Cochran)
MSDS Information
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Cesium iodide English
ACROS English
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Cesium iodide Usage And Synthesis
DescriptionCesium iodide is a soft material and extremely hygroscopic. Cesium iodide scintillators have been used extensively for indirect x-ray imaging detectors, such as for CT examinations. Cesium iodide is also used to construct electromagnetic shower detector for the CLEO II experiment, which investigates electron-positron annihilation at center-of-mass energies near 10 GeV. Cesium iodide is useful for beam splitters for Far IR spectrophotometers and IR transmission windows.
References[1] W. Zhao, G. Ristic, J. A. Rowlands, X-ray imaging performance of structured cesium iodide scintillators, Medical Physics, 2004, vol. 31, 2594-605
[2] E. Blucher, B. Gittelmann, B. K. Heltsley, J. Kandaswamy, R. Kowalewski, Y.Kubota, N. Mistry and S. Stone, Tests of cesium iodide crystals for an electromagnetic calorimeter, Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1986, vol. 249, 201-227
[3] M. Völk, O. W. Hamer, S. Feuerbach, M. Strotzer, Dose reduction in skeletal and chest radiography using a large-area flat-panel detector based on amorphous silicon and thallium-doped cesium iodide: technical background, basic image quality parameters, and review of the literature, European Radiology, 2004, vol. 14, 827-834

Chemical Propertieswhite crystalline powder
UsesPrisms for infrared spectroscopy; in x-ray fluorescent screens, scintillation counters.
UsesCesium iodide (CsI) is a kind of ionic compound that has been widely used as scintillators in many areas such as X-ray image intensifier tubes, photocathodes, and display devices.
Cesium iodide is used in scintillation counters(Geiger counters) to measure levels of external radiation. It is also useful as a "getter" to remove air molecules remaining in vacuum tubes.
Cesium Iodide is a material with high γ-ray stopping power due to its relative high density and atomic number. For scintillation counting, it is used either in its un-doped form or doped with sodium or thallium.
CsI is resistant to thermal and mechanical shock. The physical characteristics of CsI are independent of the activator used. Compared to NaI(Tl), it is relatively soft and plastic, and does not cleave. Because it has no cleavage plane, it is quite rugged-which makes it well-suited for well logging, space research or other applications where severe shock conditions are encountered.


UsesCesium iodide is used in FT-IR (Fourier Transform Infrared Spectrometers) as a beamsplitter. Cesium Iodide exhibits high gamma-ray stopping power. Useful as input phosphor in fluoroscopy equipment, and efficient photocathode for extreme ultraviolet wavelengths. Fast and dense scintillating material - useful in electromagnetic calorimetry in particle physics.
General DescriptionCesium iodide is a simple ionic salt. It has the capacity to undergo second order transformation from cubic B2 structure to body-centered tetragonal structure at low pressures. It is mostly used as input screens of X-ray image intensifiers.
Flammability and ExplosibilityNonflammable
Safety ProfileModerately toxic by ingestion and intraperitoneal routes. See also CESIUM and IODIDES. When heated to decomposition, it emits toxic fumes of I-.
Purification MethodsCrystallise it from warm water (1mL/g) by cooling to -5o.
Cesium iodide Preparation Products And Raw materials
CESIUM 2-ETHYLHEXOXIDE (0.8-1.0M IN OCTANE/TOLUENE) Cesium sulfate CESIUM HYDROXIDE, HYDRATE (99.9%-CS) NESSLER'S REAGENT Potassium iodide CESIUM DODECAHYDRODODECABORATE Cesium bromide Caesium fluoride Cesium chloride Propidium iodide CESIUM TRIIODIDE CESIUM BROMOIODIDE CESIUM DICHLOROIODIDE 99.999% RHENIUM Iodine Cesium iodide (CsI), sodium-doped Cesium iodide Cesium Caesium Iodide

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