Description

Cesium Hydroxide is a powerful inorganic base with the CAS registry number 21351-79-1. This compound is highly valued in advanced technology and research sectors for its exceptional alkalinity and unique cesium ion properties. It serves as a critical precursor and catalyst in the synthesis of specialty chemicals, electronics, and energy applications. Industries requiring high-purity alkali metal sources, such as pharmaceuticals and optoelectronics, rely on its consistent quality.

Application

• Catalyst Synthesis: Used as a potent base catalyst in organic synthesis, particularly for condensation and esterification reactions.
• Electrolyte Production: A key component in the formulation of alkaline electrolytes for specialized fuel cells and batteries.
• Chemical Precursor: Essential for producing other cesium salts, such as cesium carbonate and cesium acetate, used in various industrial processes.
• Petroleum Industry: Employed as an additive in drilling fluids to stabilize clay formations and control pH.
• Glass & Ceramics: Used in the manufacture of specialty glasses and optical materials to modify refractive index and density.
• Research & Development: Serves as a standard reagent in analytical chemistry and academic research involving strong alkali metals.

Basic Information

Product Name	Cesium Hydroxide
CAS No.	21351-79-1
Molecular Formula	CsOH
Molecular Weight	149.91 g/mol
Synonyms	Cesium hydrate; Caesium hydroxide; Cesium hydroxide monohydrate; Cesium(I) hydroxide; Caesium(I) hydroxide; Hydroxycesium; UN2682 (for solution)
EINECS	244-344-1

Quality Control

Our Cesium Hydroxide is manufactured under strict quality management systems to ensure batch-to-batch consistency and high purity. The product undergoes comprehensive analytical testing, including assay by titration and impurity profiling, to meet exacting customer requirements. Certificates of Analysis (COA) documenting purity, heavy metal content, and other critical parameters are available for every batch upon request.

Storage

Preserve in a tightly closed container, protected from light. Due to its highly hygroscopic (moisture-sensitive) nature, the material must be stored in a cool, dry place with minimal exposure to atmospheric humidity. For long-term stability, storage under an inert atmosphere such as argon or nitrogen in a sealed desiccator is recommended. Keep away from acids and incompatible materials.

Specification

Item	Specification
Appearance	White or yellowish crystalline solid / solution
Identification (IR)	Conforms
Assay (CsOH)	≥ 95.0%
Assay (CsOH • H₂O)	≥ 85.0%
Water (Karl Fischer)	Contact for details
Chloride (Cl)	≤ 0.01%
Sulfate (SO₄)	≤ 0.01%
Heavy Metals (as Pb)	≤ 10 ppm
Iron (Fe)	≤ 10 ppm

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