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Caesiumiodid

Cesium iodide Struktur
7789-17-5
CAS-Nr.
7789-17-5
Bezeichnung:
Caesiumiodid
Englisch Name:
Cesium iodide
Synonyma:
CESIUM IODINE;Cesium iodide, 99.9%, for analysis;CESIUM IODIDE;Caesiumiodide;CesiumIodideGr;Caesium iodide;Caesium lodide;cesiummonoiodide;dicesiumdiiodide;CESIUM IODIDE AR
CBNumber:
CB8471666
Summenformel:
CsI
Molgewicht:
259.81
MOL-Datei:
7789-17-5.mol

Caesiumiodid Eigenschaften

Schmelzpunkt:
626 °C (lit.)
Siedepunkt:
1280 °C
Dichte
4.51 g/mL at 25 °C (lit.)
Brechungsindex
1.7876
Flammpunkt:
1280°C
storage temp. 
Keep in dark place,Inert atmosphere,Room temperature
L?slichkeit
soluble in ethanol, methanol, acetone
Aggregatzustand
beads
Farbe
White
Wichte
4.51
PH
pH(50g/l, 25℃) : 5.0~9.0
Wasserl?slichkeit
74 g/100 mL (20 ºC)
Sensitive 
Hygroscopic
Merck 
14,2014
Expositionsgrenzwerte
ACGIH: TWA 0.01 ppm
Dielectric constant
5.6(Ambient)
Stabilit?t:
Stable. Deliquescent.
CAS Datenbank
7789-17-5(CAS DataBase Reference)
NIST chemische Informationen
Cesium iodide(7789-17-5)
EPA chemische Informationen
Cesium iodide (CsI) (7789-17-5)
Sicherheit
  • Risiko- und Sicherheitserkl?rung
  • Gefahreninformationscode (GHS)
Kennzeichnung gef?hrlicher Xn,Xi
R-S?tze: 36/37/38-42/43-43
S-S?tze: 22-36/37-45
RIDADR  UN 3077 9 / PGIII
WGK Germany  2
RTECS-Nr. FL0350000
8
TSCA  Yes
HS Code  28276000
Toxizit?t LD50 i.p. in rats: 1.4 g/kg (Cochran)
Bildanzeige (GHS) GHS hazard pictogramsGHS hazard pictograms
Alarmwort Warnung
Gefahrenhinweise
Code Gefahrenhinweise Gefahrenklasse Abteilung Alarmwort Symbol P-Code
H400 Sehr giftig für Wasserorganismen. Kurzfristig (akut) gew?ssergef?hrdend Kategorie 1 Warnung GHS hazard pictogramssrc="/GHS09.jpg" width="20" height="20" /> P273, P391, P501
Sicherheit
P201 Vor Gebrauch besondere Anweisungen einholen.
P202 Vor Gebrauch alle Sicherheitshinweise lesen und verstehen.
P273 Freisetzung in die Umwelt vermeiden.
P280 Schutzhandschuhe/Schutzkleidung/Augenschutz tragen.
P308+P313 BEI Exposition oder falls betroffen: ?rztlichen Rat einholen/?rztliche Hilfe hinzuziehen.
P391 Verschüttete Mengen aufnehmen.

Caesiumiodid Chemische Eigenschaften,Einsatz,Produktion Methoden

R-S?tze Betriebsanweisung:

R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.
R42/43:Sensibilisierung durch Einatmen und Hautkontakt m?glich.

S-S?tze Betriebsanweisung:

S22:Staub nicht einatmen.
S36/37:Bei der Arbeit geeignete Schutzhandschuhe und Schutzkleidung tragen.
S45:Bei Unfall oder Unwohlsein sofort Arzt zuziehen (wenn m?glich, dieses Etikett vorzeigen).

Chemische Eigenschaften

white crystalline powder

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.

Allgemeine Beschreibung

Cesium 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.

Sicherheitsprofil

Moderately toxic by ingestion and intraperitoneal routes. See also CESIUM and IODIDES. When heated to decomposition, it emits toxic fumes of I-.

Synthese

The main method for preparing cesium iodide-based single crystals is Kyropoulos growth, which allows one to obtain cylindrical ingots weighing up to several tens of kilograms.
Cs2CO3+ 2HI→2CsI+H2O+CO2↑
Technically, pure CsI was prepared by dissolving cesium carbonate in hydriodic acid at room temperature in a vessel from niobium, which was nonreactive with cesium iodide at elevated temperatures. The solution was heated to boiling at pH 3 to completely dissolve the caesium carbonate because the niobium vessel was unstable in an acid medium.The hot solution was filtered and boiled down at a temperature near 393 K. After crystallization, the material was vacuum-dried in a quartz ampule[4].

l?uterung methode

Crystallise it from warm water (1mL/g) by cooling to -5o.

Structure and conformation

The space lattice of CsI belongs to the cubic system, and its cesium chloride structure has a lattice constant of a=0.8529 nm.

Caesiumiodid Upstream-Materialien And Downstream Produkte

Upstream-Materialien

Downstream Produkte


Caesiumiodid Anbieter Lieferant Produzent Hersteller Vertrieb H?ndler.

Global( 392)Lieferanten
Firmenname Telefon E-Mail Land Produktkatalog Edge Rate
Hebei Weibang Biotechnology Co., Ltd
+8617732866630
bess@weibangbio.com China 18148 58
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17749774353
1715438216@qq.com China 52 58
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+86 13288715578 +8613288715578
sales@hbmojin.com China 12831 58
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+8617531153977
allison@yan-xi.com China 5856 58
Hebei Chuanghai Biotechnology Co,.LTD
+86-13131129325
sales1@chuanghaibio.com China 5889 58
hebei hongtan Biotechnology Co., Ltd
+86-86-1913198-3935 +8617331935328
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+8615373025980
clara@hbshengyang.com China 895 58
Hebei Mojin Biotechnology Co.,Ltd
+8613288715578
angelia@hbmojin.com China 1175 58
Hebei Zhuanglai Chemical Trading Co Ltd
+86-16264648883 +86-16264648883
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Henan Tianfu Chemical Co.,Ltd.
+86-0371-55170693 +86-19937530512
info@tianfuchem.com China 21634 55

7789-17-5(Caesiumiodid)Verwandte Suche:


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