Products Description of Cesium(I) Iodide CAS#7789-17-5
Cesium iodide, abbreviated as CsI, and inorganic halides including CsI(Tl) are widely used as scintillating media for high-energy particle and ionizing radiation detectors. Vacuum-deposited CsI(Tl) thin films were first used for x-ray imaging in photoelectric converters.
In advanced digital x-ray imaging, CsI(Tl) scintillator films are widely used in x-ray imaging because of their high scintillation efficiency for x-ray radiation, high spatial resolution, and good matching to spectrally sensitive silicon-based readout arrays.
| 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 |
| solubility | soluble in ethanol, methanol, acetone |
| form | beads |
| Specific Gravity | 4.51 |
| color | White |
| PH | pH(50g/l, 25℃) : 5.0～9.0 |
| Water Solubility | 74 g/100 mL (20 ºC) |
| Sensitive | Hygroscopic |
| Merck | 14,2014 |
| Exposure limits | ACGIH: TWA 0.01 ppm |
| Dielectric constant | 5.6（Ambient） |
| Stability: | Stable. Deliquescent. |
| CAS DataBase Reference | 7789-17-5(CAS DataBase Reference) |
| NIST Chemistry Reference | Cesium iodide(7789-17-5) |
| EPA Substance Registry System | Cesium iodide (CsI) (7789-17-5) |
| 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 |
| F | 8 |
| TSCA | Yes |
| HS Code | 28276000 |
| Toxicity | LD50 i.p. in rats: 1.4 g/kg (Cochran) |
Cesium iodide crystals are often used as scintillators in electromagnetic calorimeters in particle physics experiments. Cesium iodide can be used as a spectroscope in Fourier transform spectroscopy (FT-IR) spectrometers.
Cesium iodide has a wider light transmission range than the more commonly used potassium bromide spectroscope, and the use band can extend to the far infrared. However, there is a problem. Optical Cesium Iodide crystals are very soft and have no cleavage, so it is difficult to make a flat polished surface.
In addition, Cesium Iodide optical crystals must be stored in a dry container to prevent water from reacting with Cesium Iodide. Coating the surface of Cesium Iodide with a layer of germanium can minimize the effect of moisture in the air when exchanging spectroscopes.
Inventory 2-3 working days New production 7-10 working days
