Cesium Oxide supplier | CasNO.20281-00-9

Name
CESIUM OXIDE
EINECS
CAS No. 20281-00-9
Article Data71
CAS DataBase
Density g/cm³
Solubility very soluble H2O; soluble acids [HAW93]
Melting Point 490°C
Formula Cs2O
Boiling Point 100°Cat760mmHg
Molecular Weight 281.81
Flash Point °C
Transport Information
Appearance
Safety Ignition or incandescent reaction on contact with water; ethanol; moisture + carbon monoxide or carbon dioxide; sulfur dioxide + heat; or halogens (fluorine; chlorine; or iodine) above 150°C. Reacts with H₂O. with formation of CsOH. See also CESIUM.
Risk Codes
Molecular Structure
Hazard Symbols
Synonyms Cesiumoxide (6CI,8CI); Dicesium monoxide; Dicesium oxide
PSA 0.00000
LogP -0.11880

Cesium Oxide Chemical Properties

Chemistry informtion about Cesium Oxide (CAS NO.20281-00-9) is:
IUPAC Name: Dicesium Hydroxide
Synonyms: Dicesium Oxide ; Oxydicesium
MF: Cs₂O
MW: 281.8103
EINECS: 243-679-0
Density 4.65 g/cm³Melting point: 490 °C (under N₂)
Following is the molecular structure of Cesium Oxide (CAS NO.20281-00-9) is:

Cesium Oxide History

L. R. Koller described the first modern photoemissive surface in 1929–30 as a layer of caesium on a layer of caesium oxide on a layer of silver.

Cesium Oxide Uses

Cesium Oxide (CAS NO.20281-00-9) is used in photocathodes to detect infrared signals in devices such as image intensifiers, vacuum photodiodes, photomultipliers, and TV camera tubes. It is a good electron emitter; however, its high vapor pressure limits its usefulness.

Cesium Oxide Safety Profile

Ignition or incandescent reaction on contact with water; ethanol; moisture + carbon monoxide or carbon dioxide; sulfur dioxide + heat; or halogens (fluorine; chlorine; or iodine) above 150°C. Reacts with H₂O. with formation of CsOH. See also CESIUM.
RIDADR: 3180
HazardClass: 4.1
PackingGroup: II

Cesium Oxide Analytical Methods

Elemental magnesium reduces caesium oxide to elemental caesium, forming magnesium oxide as a side-product:
Cs₂O + Mg → Cs + MgO

Cesium Oxide Specification

Cesium Oxide (CAS NO.20281-00-9) is a yellow-orange hexagonal crystals.

Product Name

CESIUM OXIDE