| 词条 | Caesium hydroxide |
| 释义 |
| Watchedfields = changed | verifiedrevid = 443494816 | Name = {{PAGENAME}} | OtherNames = Cesium hydrate | ImageFile = Cesium hydroxide monohydrate.jpg |Section1={{Chembox Identifiers | InChI = 1/Cs.H2O/h;1H2/q+1;/p-1 | ChEBI_Ref = {{ebicite|correct|EBI}} | ChEBI = 33988 | SMILES = [OH-].[Cs+] | InChIKey = HUCVOHYBFXVBRW-REWHXWOFAG | StdInChI_Ref = {{stdinchicite|correct|chemspider}} | StdInChI = 1S/Cs.H2O/h;1H2/q+1;/p-1 | StdInChIKey_Ref = {{stdinchicite|correct|chemspider}} | StdInChIKey = HUCVOHYBFXVBRW-UHFFFAOYSA-M | CASNo = 21351-79-1 | CASNo_Ref = {{cascite|correct|CAS}} | EC_number = 244-344-1 | ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}} | ChemSpiderID = 56494 | RTECS = FK9800000 | UNNumber = 2682 | PubChem = 62750 | UNII = 458ZFZ6235 |Section2={{Chembox Properties | Formula = CsOH | MolarMass = 149.912 g/mol | Appearance = Whitish-yellow deliquescent crystals | Density = 3.675 g/cm3 | MeltingPtC = 272 | MeltingPt_ref = [1] | Solubility = 300 g/100 mL at 30 °C | SolubleOther = Soluble in ethanol[2] | pKb = -1.76 (CsOH(aq) = Cs+ + OH–) [3] |Section3={{Chembox Structure | Coordination = | CrystalStruct = |Section4={{Chembox Thermochemistry | DeltaHf = −416.2 kJ·mol−1 | Entropy = 104.2 J·K−1·mol−1 | HeatCapacity = 69.9 J·mol−1·K−1[4] |Section7={{Chembox Hazards | NFPA-H = 3 | NFPA-F = 0 | NFPA-R = 1 | NFPA-S = ALK | ExternalSDS = ICSC 1592 | FlashPt = Not flammable | LD50 = 570 mg/kg (oral, rat)[5] | PEL = none[6] | REL = TWA 2 mg/m3[6] | IDLH = N.D.[6] | GHSSignalWord = Danger | GHSPictograms = {{GHS05}}{{GHS07}}{{GHS08}} | HPhrases = {{H-phrases|302|314|318|361|373}} | PPhrases = {{P-phrases|201|202|260|264|270|280|281|301+312|301+330+331|303+361+353|304+340|305+351+338|308+313|310|314|321|330|363|405|501}} |Section8={{Chembox Related | OtherAnions = Caesium oxide Caesium fluoride | OtherCations = Lithium hydroxide Sodium hydroxide Potassium hydroxide Rubidium hydroxide }} Caesium hydroxide or cesium hydroxide (CsOH) is a chemical compound consisting of caesium ions and hydroxide ions. It is a strong base (pKb=-1.76), much like the other alkali metal hydroxides such as sodium hydroxide and potassium hydroxide. In fact, caesium hydroxide is corrosive enough to quickly corrode through glass. Due to its high reactivity, caesium hydroxide is extremely hygroscopic. Laboratory caesium hydroxide is typically a hydrate. It is an anisotropic etchant of silicon, exposing octahedral planes. This technique can form pyramids and regularly shaped etch pits for uses such as Microelectromechanical systems. It is known to have a higher selectivity to etch highly p-doped silicon than the more commonly used potassium hydroxide. This compound is not commonly used in experiments due to the high extraction cost of caesium and its reactive behaviour. It acts in similar fashion to the compounds rubidium hydroxide and potassium hydroxide, although more reactive. References1. ^{{cite web|url=http://www.inchem.org/documents/icsc/icsc/eics1592.htm|title=ICSC 1592 - Cesium Hydroxide|publisher=}} 2. ^{{Citation| last = Lide| first = David R.| year = 1998| title = Handbook of Chemistry and Physics| edition = 87| publication-place = Boca Raton, Florida| publisher = CRC Press| id =| isbn = 0-8493-0594-2| pages = 4–51}} 3. ^{{cite web|url=http://www.periodensystem-online.de/index.php?show=list&id=acid&prop=pKb-Werte&sel=oz&el=92|title=Sortierte Liste: pKb-Werte, nach Ordnungszahl sortiert. – Das Periodensystem online|publisher=}} 4. ^{{Citation| last = Lide| first = David R.| year = 1998| title = Handbook of Chemistry and Physics| edition = 87| publication-place = Boca Raton, Florida| publisher = CRC Press| id =| isbn = 0-8493-0594-2| pages = 5–14}} 5. ^{{cite web|url=http://chem.sis.nlm.nih.gov/chemidplus/rn/21351-79-1|title=ChemIDplus - 21351-79-1 - HUCVOHYBFXVBRW-UHFFFAOYSA-M - Cesium hydroxide - Similar structures search, synonyms, formulas, resource links, and other chemical information.|first=Michael|last=Chambers|publisher=}} 6. ^1 2 {{PGCH|0111}} External links
3 : Caesium compounds|Hydroxides|Deliquescent substances |
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