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HCID 24601Erstellt: 24. Oktober 2026
Cesium iodide
Caesium iodide · CESIUM IODINE · Cesium iodide, 99.9%, for analysis · CESIUM IODIDE · Caesiumiodide · CesiumIodideGr · Caesium lodide · cesiummonoiodide
https://huagongshe.com/de/chemical/24601
Identifikatoren & physikalische Daten
| CAS No. | 7789-17-5 |
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| Summenformel | CsI |
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| Durchschnittliche Molmasse | 259,8099 g/mol |
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| Monoisotopische Masse | 259,8099249 g/mol |
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| SMILES | [Cs+].[I-] |
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| InChIKey | XQPRBTXUXXVTKB-UHFFFAOYSA-M |
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| PubChem CID | 24601 |
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| EC No. | 232-145-2 |
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| DTXSID | DTXSID3064859 |
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| Lokaler Name | Caesiumiodid |
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Chemische & physikalische Eigenschaften
| Polarare Oberfläche (TPSA) | 0 |
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| H-Brücken-Donoren | 0 |
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| H-Brücken-Akzeptoren | 1 |
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| Frei drehbare Bindungen | 0 |
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| Schwere Atome | 2 |
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| Formalladung | 0 |
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| Komplexität | 2 |
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| Stoffklassen | Metals -> Metals, Inorganic Compounds |
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| SpringerMaterials Properties | dielectric constant |
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| Dichte | 4.51 @25 °C4.51 g/mL at 25 °C (lit.) |
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| Siedepunkt | 1280 °C @760 [mm Hg] |
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| Schmelzpunkt | 632 °C626 °C (lit.) |
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| Physical Description | Deliquescent solid[Merck Index] White hygroscopic solidOdorless[Alfa Aesar MSDS] |
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| Brechungsindex | 1.7876 |
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| Flammpunkt | 1280°C |
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| Lagerbedingungen | Keep in dark place,Inert atmosphere,Room temperature |
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| Löslichkeit | soluble in ethanol, methanol, acetone74 g/100 mL (20 ºC) |
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| Aggregatzustand | beads |
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| Wichte | 4.51 |
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| Farbe | White |
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| pH | pH(50g/l, 25℃) : 5.0～9.0 |
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| Spezifische Wärmekapazität | Cp(crystal): 0.2 J/(g·K), at 25℃ |
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| Merck | 14,2014 |
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| Dielektrizitätskonstante | 5.6(Ambient) |
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| Stabilität | Stable. Deliquescent. |
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| Hauptanwendungen | cleaning productscosmeticsflavors and fragrancesfood and beveragespersonal care |
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| InChI | 1S/Cs.HI/h1H/q+1/p-1 |
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| InChIKey | XQPRBTXUXXVTKB-UHFFFAOYSA-M |
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| SMILES | [I-].[Cs+] |
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| CAS Datenbank | 7789-17-5(CAS DataBase Reference) |
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| NIST chemische Informationen | Cesium iodide(7789-17-5) |
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| EPA chemische Informationen | Cesium iodide (CsI) (7789-17-5) |
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Sicherheit & Vorschriften
| GHS-Einstufung | This chemical does not meet GHS hazard criteria for 33% (30 of 91) of reports.WarningH315 (48.4%): Causes skin irritation [Warning Skin corrosion/irritation]P261, P264, P264+P265, P271, P272, P273, P280, P302+P352, P304+P340, P305+P351+P338, P319, P321, P332+P317, P333+P317, P337+P317, P362+P364, P391, P403+P233, P405, and P501 (click each P-code to see the statement)Aggregated GHS information provided per 91 reports by companies from 10 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies. |
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| Regulatorische Informationen | Chemical: Cesium iodide (CsI)Status: Active Update: 16-05-2023 https://echa.europa.eu/registration-dossier/-/registered-dossier/12840Caesium iodide: Does not have an individual approval but may be used under an appropriate group standard |
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| Weitere Sicherheitsinformationen | Evaluation - Cesium salts |
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| Gefahrenübersicht | A skin and strong eye irritantMay cause skin sensitizationHarmful by ingestion[Alfa Aesar MSDS] See Cesium. See Iodine for the TLV of Iodides. |
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| Hazard Classes and Categories | Skin Irrit. 2 (48.4%) |
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| Threshold Limit Values (TLV) | 0.01 [ppm], inhalable fraction and vapor (iodides) |
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| Protective Action Criteria (PAC) | 7.2 [mg/m3]79 [mg/m3]470 [mg/m3] |
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| Unerwünschte Wirkungen | Skin Sensitizer - An agent that can induce an allergic reaction in the skin. |
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| F | 8 |
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| Wassergefährdungsklasse (WGK) | 2 |
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| TSCA-Inventar-Status | TSCA listed |
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| UN-Transportnummer | UN 3077 9 / PGIII |
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| Zollcode | 28276000 |
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| RTECS-Nr. | FL0350000 |
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| R-Sätze (R) | 36/37/38-42/43-43 |
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| Toxizität | LD50 i.p. in rats: 1.4 g/kg (Cochran) |
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| Gefahrensymbole | Xn,Xi |
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| Sicherheitshinweise (S) | 22-36/37-45 |
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| Gefahrenklasse | 9Aquatic Acute 1Repr. 2 |
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| Lagerklasse | 13 - Non Combustible Solids |
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Anwendungen & Verwendung
Verwenden
Cesium 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.
