21351-79-1 Usage
Description
Cesium hydroxide is a colorless to yellow crystalline solid that is highly deliquescent, very alkaline, and soluble in water and ethanol. It is a water-soluble source of cesium and is typically found in several hydrate forms. Its applications are limited due to its volatility, high basicity, and the high cost of cesium extraction.
Uses
Used in Ion-Exchange Materials:
Cesium hydroxide is used in the preparation of porous cesium titanosilicates, which are potential ion-exchange materials utilized for radioactive waste cleaning purposes.
Used in Cesium Salts Preparation:
It is involved in the preparation of other cesium salts.
Used in Alkaline Storage Batteries:
Cesium hydroxide is used as an electrolyte in alkaline storage batteries, particularly below the freezing point of water.
Used in Organic Synthesis:
It is used as a catalyst in organic synthesis, such as the controlled alkylation of amines, where the cesium ion is explicitly involved in the reaction.
Used in Color Photography:
Cesium hydroxide is used in color photography.
Used in Polyol Synthesis:
Cesium hydroxide is used as a base catalyst in the production of polyols, which are important raw materials for the production of polyurethane foams. Its use minimizes the isomerization tendency of polyols, leading to better polymerization with polyisocyanate.
Used in Industrial Catalysis:
Cesium hydroxide solution is used in industrial catalysis, where it acts as a promoter, for example, in the production of polyols.
Sources
https://www.alfa.com/en/catalog/B22480/
https://www.alfa.com/en/catalog/013233/
https://en.wikipedia.org/wiki/Caesium_hydroxide
https://pubchem.ncbi.nlm.nih.gov/compound/Cesium_hydroxide#section=Use-and-Manufacturing
http://www.chemicalland21.com/industrialchem/inorganic/CESIUM%20HYDROXIDE.htm
https://www.americanelements.com/cesium-hydroxide-hydrate-12260-45-6
Preparation
Cesium hydroxide is prepared by electrolysis of cesium salts to obtain cesium metal, which then reacts with water to yield hydroxide. It also is prepared by the action of barium hydroxide with an aqueous solution of cesium sulfate.
Reactivity Profile
CESIUM HYDROXIDE,SOLUTION neutralizes acids exothermically to form salts plus water. Reacts with certain metals (such as aluminum and zinc) to form oxides or hydroxides of the metal and generate gaseous hydrogen. May initiate polymerization reactions in polymerizable organic compounds, especially epoxides. May generate flammable and/or toxic gases with ammonium salts, nitrides, halogenated organics, various metals, peroxides, and hydroperoxides. May serve as a catalyst. Reacts when heated above about 84°C with aqueous solutions of reducing sugars other than sucrose, to evolve toxic levels of carbon monoxide [Bretherick, 5th Ed., 1995].
Hazard
A poison. Skin, eye, and upper respiratory
tract irritant.
Health Hazard
TOXIC; inhalation, ingestion or skin contact with material may cause severe injury or death. Contact with molten substance may cause severe burns to skin and eyes. Avoid any skin contact. Effects of contact or inhalation may be delayed. Fire may produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause pollution.
Fire Hazard
Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes. Some are oxidizers and may ignite combustibles (wood, paper, oil, clothing, etc.). Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated.
Flammability and Explosibility
Nonflammable
Safety Profile
Poison by
intraperitoneal route. Moderately toxic by
ingestion. A powerful caustic. A corrosive
skin and eye irritant. See also CESIUM.
Potential Exposure
Cesium hydroxide may be used as a
raw material for other cesium salts; such as the chloride
which in turn may be used to produce cesium metal.
Cesium metal is used in electronic devices.
Shipping
UN2682 Cesium hydroxide, Hazard class: 8;
Labels: 8-Corrosive material. UN2681 Cesium hydroxide,
solution, Hazard class: 8; Labels: 8-Corrosive material
Incompatibilities
Cesium hydroxide is the strongest base
known. Keep away from all acids. It must be stored in silver or platinum and out of contact with air because of its
reactivity with glass. CsOH causes the generation of considerable heat in contact with water or moisture. Contact
with many organic compounds, many metals (i.e., aluminum, lead, tin, zinc), glass, oxygen, or carbon dioxide
causes a violent reaction.
Check Digit Verification of cas no
The CAS Registry Mumber 21351-79-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,3,5 and 1 respectively; the second part has 2 digits, 7 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 21351-79:
(7*2)+(6*1)+(5*3)+(4*5)+(3*1)+(2*7)+(1*9)=81
81 % 10 = 1
So 21351-79-1 is a valid CAS Registry Number.