Description

Cesium Oxide CAS NO 20281-00-9 is an inorganic compound of cesium and oxygen, typically appearing as a yellowish to orange hygroscopic solid. It serves as a critical precursor and specialized reagent in advanced material science and electronics manufacturing. This high-purity material is essential for industries requiring precise control over chemical composition and reactivity, particularly in environments where moisture sensitivity must be carefully managed.

Application

• Catalyst Synthesis: Used as a precursor or promoter in the development of specialized catalysts for organic synthesis and petroleum refining.
• Electronic Materials: A key starting material for producing cesium salts and compounds used in photocathodes, scintillation crystals, and specialized glass formulations.
• Getter in Vacuum Tubes: Employed as a getter material to absorb residual gases in high-vacuum electronic devices and display technologies.
• Research & Development: Serves as a fundamental reagent in academic and industrial R&D for exploring new cesium-based materials and chemical processes.
• Optical Coatings: Utilized in the deposition of thin films for optical applications where specific refractive indices are required.
• Specialty Glass Production: Acts as a modifying agent to alter the electrical and optical properties of specialty glasses.

Basic Information

Product Name	Cesium Oxide
CAS No.	20281-00-9
Molecular Formula	Cs2O
Molecular Weight	281.81 g/mol
Synonyms	Cesium Monoxide; Dicesium Oxide; Dicesium Monoxide; Cesium(I) Oxide; Cesa; Cesium Oxide (Cs2O)
EINECS	243-679-0

Quality Control

Our Cesium Oxide is manufactured under controlled conditions to ensure batch-to-batch consistency and high chemical purity. Quality is verified through a suite of analytical techniques including X-ray diffraction (XRD) for phase identification and titration for assay determination. A Certificate of Analysis (COA) detailing purity, moisture content, and other critical parameters is provided with each shipment to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Due to its hygroscopic nature, this material must be stored in a cool, dry place under an inert atmosphere (e.g., argon or nitrogen) to prevent decomposition. The recommended storage temperature is 15-25°C. Always handle in a moisture-controlled environment such as a glove box or dry room.

Specification

Item	Specification
Appearance	Yellowish to orange powder or lumps
Identification (XRD)	Conforms to Cs2O structure
Assay (Cs2O)	≥ 98.0 %
Moisture Content	≤ 2.0 % (Karl Fischer)
Insoluble Matter	≤ 0.5 %

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.