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21351-79-1

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21351-79-1 Usage

Description

Cesium Hydroxide, as a water-soluble source of cesium, is typically found in any of several hydrate forms. Its applications are relatively limited due to its volatility and high basicity – corroding glass – as well as the high cost of cesium extraction. These applications include use as an electrolyte in alkaline batteries, particularly below the freezing point of water, in color photography, and as a catalyst for synthesis of organics such as phenylacetylene and polymers. Furthermore, it also finds use as a precursor in the manufacture of cesium salts.

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

Chemical Properties

Cesium hydroxide is a colorless-to-yellow crystalline compound. It is often used in a water solution.

Physical properties

White to yellowish fused crystalline mass; highly deliquescent; very alkaline; density 3.68 g/cm3; melts 272°C; highly soluble in water; soluble in ethanol; aqueous solution is very alkaline.

Uses

Cesium hydroxide is used in the preparation of porous cesium titanosilicates, which are potential ion-exchange materials utilized for radioactive wastes cleaning purpose. It is also involved in the preparation of other cesium salts. Further, it is used as an electrolyte in alkaline storage batteries and as a catalyst in organic synthesis. In addition to this, it is used in color photography.

Definition

ChEBI: Caesium hydroxide is an alkali metal hydroxide and a caesium molecular entity.

Application

Cesium hydroxide also exerts unusual effects in organic reactions, such as the controlled alkylation of amines. In this instance, the cesium ion itself is explicitly involved in the reaction. The hydroxide base promotes an alkylation of a primary amine, while the Cs+ ion weakly coordinates to the amine such that further alkylation is inhibited, preventing formation of dialkyl and trialkyl amines.Cesium hydroxide solution is used in industrial catalysis. Cesium acts as apromoter e.g. in the production of polyols. Polyols are important raw materials for the production of polyurethane foams. Their synthesis profits from use of cesium hydroxide as base catalyst. In polyol synthesis isomerization of the starting material propylene oxide is an adverse side reaction eventually leading to chain termination in the polymerization with polyisocyanate. The tendency of polyols to undergo isomerization is minimized when using cesium hydroxide, as isomerization tendency decreases in the order Li > Na > K > Rb > Cs.

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.

General Description

Cesium hydroxide is a colorless to yellow crystalline solid. Harmful to skin and eyes. Used in electric storage batteries.

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.

21351-79-1 Well-known Company Product Price

  • Brand
  • (Code)Product description
  • CAS number
  • Packaging
  • Price
  • Detail
  • Alfa Aesar

  • (10020)  Cesium hydroxide, 50% w/w aq. soln., 99.9% (metals basis)   

  • 21351-79-1

  • (c)25g

  • 851.0CNY

  • Detail
  • Alfa Aesar

  • (10020)  Cesium hydroxide, 50% w/w aq. soln., 99.9% (metals basis)   

  • 21351-79-1

  • (c)100g

  • 3402.0CNY

  • Detail
  • Alfa Aesar

  • (16505)  Cesium hydroxide, 50% w/w aq. soln., 99% (metals basis)   

  • 21351-79-1

  • (c)100g

  • 583.0CNY

  • Detail
  • Alfa Aesar

  • (16505)  Cesium hydroxide, 50% w/w aq. soln., 99% (metals basis)   

  • 21351-79-1

  • (c)500g

  • 2478.0CNY

  • Detail
  • Aldrich

  • (232041)  Cesiumhydroxidesolution  50 wt. % in H2O, 99.9% trace metals basis

  • 21351-79-1

  • 232041-10G

  • 500.76CNY

  • Detail
  • Aldrich

  • (232041)  Cesiumhydroxidesolution  50 wt. % in H2O, 99.9% trace metals basis

  • 21351-79-1

  • 232041-50G

  • 1,351.35CNY

  • Detail
  • Aldrich

  • (232041)  Cesiumhydroxidesolution  50 wt. % in H2O, 99.9% trace metals basis

  • 21351-79-1

  • 232041-200G

  • 4,130.10CNY

  • Detail
  • Aldrich

  • (232068)  Cesiumhydroxidesolution  50 wt. % in H2O, 99% trace metals basis (purity determined on metals basis)

  • 21351-79-1

  • 232068-100G

  • 1,227.33CNY

  • Detail
  • Aldrich

  • (232068)  Cesiumhydroxidesolution  50 wt. % in H2O, 99% trace metals basis (purity determined on metals basis)

  • 21351-79-1

  • 232068-500G

  • 4,238.91CNY

  • Detail

21351-79-1SDS

SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 13, 2017

Revision Date: Aug 13, 2017

1.Identification

1.1 GHS Product identifier

Product name caesium hydroxide

1.2 Other means of identification

Product number -
Other names Cesium hydroxide

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:21351-79-1 SDS

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