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202134

Sigma-Aldrich

Cesium iodide

99.9% trace metals basis

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Synonym(s):
Caesium iodide, Caesium monoiodide
Empirical Formula (Hill Notation):
CsI
CAS Number:
Molecular Weight:
259.81
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.23

Quality Level

assay

99.9% trace metals basis

form

powder

impurities

≤1500.0 ppm Trace Metal Analysis

mp

626 °C (lit.)

density

4.51 g/mL at 25 °C (lit.)

SMILES string

[I-].[Cs+]

InChI

1S/Cs.HI/h;1H/q+1;/p-1

InChI key

XQPRBTXUXXVTKB-UHFFFAOYSA-M

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1 of 4

This Item
562599C3139203033
Cesium iodide 99.9% trace metals basis

202134

Cesium iodide

Cesium chloride 99.99% trace metals basis

562599

Cesium chloride

Cesium chloride optical grade, ≥99.5% trace metals basis

C3139

Cesium chloride

Cesium iodide 99.999% trace metals basis

203033

Cesium iodide

assay

99.9% trace metals basis

assay

99.99% trace metals basis

assay

≥99.5% trace metals basis

assay

99.999% trace metals basis

density

4.51 g/mL at 25 °C (lit.)

density

-

density

-

density

4.51 g/mL at 25 °C (lit.)

mp

626 °C (lit.)

mp

645 °C (lit.)

mp

645 °C (lit.)

mp

626 °C (lit.)

impurities

≤1500.0 ppm Trace Metal Analysis

impurities

≤150.0 ppm Trace Metal Analysis

impurities

-

impurities

≤15.0 ppm Trace Metal Analysis

Application

Cesium iodide (CsI) can be used as a cathode for the fabrication of field emission cathodes for potential usage in high power microwave systems. It can also be used to form an interface layer between the blocking layer and the perovskite active layer to improve the photovoltaic performance and stability of solar cells.

Features and Benefits

Frequently used in devices such as phosphor screens for medical imaging, scintillators, calorimeters and a variety of particle detectors.

pictograms

Health hazardEnvironment

signalword

Warning

Hazard Classifications

Aquatic Acute 1 - Repr. 2

Storage Class

13 - Non Combustible Solids

wgk_germany

WGK 2

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

dust mask type N95 (US), Eyeshields, Faceshields, Gloves


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Low level plasma formation in a carbon velvet cesium iodide coated cathode
Shiffler D, et al.
Physics of Plasmas, 11(4), 1680-1684 (2004)
Comparison of velvet-and cesium iodide-coated carbon fiber cathodes
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Inorganic chemistry, 56(19), 11552-11564 (2017-09-13)
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Halide perovskites, including CsPbX3 (X = Cl, Br, I), have gained much attention in the field of optoelectronics. However, the toxicity of Pb and the low photoluminescence quantum yield (PLQY) of these perovskites hamper their use. In this work, new

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