Caesiumhydroxid

Gefahreninformationscode (GHS)

• Bildanzeige (GHS)

  

• Alarmwort

  Achtung

• Gefahrenhinweise

  H302：Gesundheitsschädlich bei Verschlucken.

  H314：Verursacht schwere Verätzungen der Haut und schwere Augenschäden.

• Sicherheit

  P280：Schutzhandschuhe/Schutzkleidung/Augenschutz tragen.

  P305+P351+P338：BEI KONTAKT MIT DEN AUGEN: Einige Minuten lang behutsam mit Wasser spülen. Eventuell vorhandene Kontaktlinsen nach Möglichkeit entfernen. Weiter spülen.

  P310：Sofort GIFTINFORMATIONSZENTRUM/Arzt/ anrufen.

Cesium hydroxide Chemische Eigenschaften,Einsatz,Produktion Methoden

• ERSCHEINUNGSBILD

  FARBLOSE BIS GELBE HYGROSKOPISCHE KRISTALLE.

• CHEMISCHE GEFAHREN

  Reagiert sehr heftig mit Wasser unter Bildung von Wärme. Starke Base. Reagiert sehr heftig mit Säuren. ätzend auf Metalle. Greift viele Metalle unter Bildung brennbarer/explosionsfähiger Gase an (z.B. Wasserstoff, ICSC-Nr. 0001).

• ARBEITSPLATZGRENZWERTE

  TLV: 2 mg/m?(als TWA) (ACGIH 2004).
  MAK nicht festgelegt (DFG 2006).
  

• AUFNAHMEWEGE

  Aufnahme in den Körper durch Verschlucken.

• INHALATIONSGEFAHREN

  Eine schädliche Partikelkonzentration in der Luft kann schnell erreicht werden durch Dispergieren.

• WIRKUNGEN BEI KURZZEITEXPOSITION

  WIRKUNGEN BEI KURZZEITEXPOSITION:
  Der Stoff ist ätzend auf die Augen, die Haut und die Atemwege. ätzend beim Verschlucken.

• LECKAGE

  Persönliche Schutzausrüstung: Atemschutzgerät, P2-Filter für schädliche Partikel. Chemikalienschutzanzug. Verschüttetes Material in abdichtbaren Plastikbehältern sammeln. Reste mit viel Wasser wegspülen.

• R-Sätze Betriebsanweisung:

  R22:Gesundheitsschädlich beim Verschlucken.
  R35:Verursacht schwere Verätzungen.
  R34:Verursacht Verätzungen.

• S-Sätze Betriebsanweisung:

  S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
  S36/37/39:Bei der Arbeit geeignete Schutzkleidung,Schutzhandschuhe und Schutzbrille/Gesichtsschutz tragen.
  S45:Bei Unfall oder Unwohlsein sofort Arzt zuziehen (wenn möglich, dieses Etikett vorzeigen).
  S37/39:Bei der Arbeit geeignete Schutzhandschuhe und Schutzbrille/Gesichtsschutz tragen.
  S27:Beschmutzte, getränkte Kleidung sofort ausziehen.
  S28:Bei Berührung mit der Haut sofort abwaschen mit viel . . . (vom Hersteller anzugeben).

• Beschreibung

  Cesium hydroxide is a colorless-to-yellowcrystalline compound. It is often used in a water solution.Molecular weight=142.92; Specific gravity (H2O:1) 53.68; Freezing/Melting point=272℃. HazardIdentification (based on NFPA 704 M Rating System):Health 3, Flammability 0, Reactivity 0. Highly soluble inwater; solubility 395% at 15℃.

• Chemische Eigenschaften

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

• Physikalische Eigenschaften

  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.

• Verwenden

  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.

• synthetische

  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.

• 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.

• Allgemeine Beschreibung

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

• Air & Water Reaktionen

  Dilution with water may generate enough heat to cause steaming or spattering.

• Reaktivität anzeigen

  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.

• Brandgefahr

  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

  Non flammable

• Sicherheitsprofil

  Poison by intraperitoneal route. Moderately toxic by ingestion. A powerful caustic. A corrosive skin and eye irritant. See also CESIUM.

• mögliche Exposition

  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.

• Erste Hilfe

  If this chemical gets into the eyes, remove anycontact lenses at once and irrigate immediately for at least30 min, occasionally lifting upper and lower lids. Seek medical attention immediately. If this chemical contacts theskin, remove contaminated clothing and wash immediatelywith soap and water. Seek medical attention immediately. Ifthis chemical has been inhaled, remove from exposure,begin rescue breathing (using universal precautions,Cesium hydroxide 591including resuscitation mask) if breathing has stopped andCPR if heart action has stopped. Transfer promptly to amedical facility. When this chemical has been swallowed,get medical attention. If victim is conscious, administerwater or milk. Do not induce vomiting.

• Lager

  Color Code—White: Corrosive or Contact Hazard:Store separately in a corrosion-resistant location. Prior toworking with cesium hydroxide you should be trained on itsproper handling and storage. Cesium hydroxide should bestored in silver or platinum away from air because it reactsviolently with oxygen. Store in tightly closed containers ina cool, well-ventilated area away from moisture and incompatible materials listed above.

• Versand/Shipping

  UN2682 Cesium hydroxide, Hazard class: 8; Labels: 8-Corrosive material. UN2681 Cesium hydroxide, solution, Hazard class: 8; Labels: 8-Corrosive material

• Inkompatibilitäten

  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.

Caesiumhydroxid Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

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