Potassium hydroxide

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Potassium hydroxide
Crystal structur o KOH
Pellets o potassium hydroxide
Names
IUPAC name
Potassium hydroxide
Ither names
Caustic potash, Potash lye, Potassia, Potassium hydrate
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
ECHA InfoCard 100.013.802
EC Nummer 215-181-3
E nummer E525 (acidity regulators, ...)
RTECS nummer TT2100000
UNII
UN nummer 1813
Properties
HKO
Molar mass 56.11 g·mol−1
Appearance white solid, deliquescent
Odour odorless
Density 2.044 g/cm3 (20 °C)[1]
2.12 g/cm3 (25 °C)[2]
Meltin pynt 406 °C (763 °F; 679 K)
Bylin pynt 1,327 °C (2,421 °F; 1,600 K)
85 g/100 g (-23.2 °C)
97 g/100 mL (0 °C)
121 g/100 mL (25 °C)
138.3 g/100 mL (50 °C)
162.9 g/100 mL (100 °C)[1][3]
Solubility soluble in alcohol, glycerol
insoluble in ether, liquid ammonia
Solubility in methanol 55 g/100 g (28 °C)[2]
Acidity (pKa) 13.5 (0.1 M)
Refractive index (nD) 1.409 (20 °C)
Structur
rhombohedral
Thermochemistry
Speceefic heat capacity, C 65.87 J/mol·K[2]
Staundart molar
entropy
So298
79.32 J/mol·K[4][2]
Std enthalpy o
formation
ΔfHo298
-425.8 kJ/mol[4][2]
-380.2 kJ/mol[2]
Hazards
GHS pictograms The corrosion pictogram in the Globally Harmonized Seestem o Classification an Labelling o Chemicals (GHS)The exclamation-mark pictogram in the Globally Harmonized Seestem o Classification an Labellin of Chemicals (GHS)[5]
GHS signal wird Danger
GHS hazard statements H302, H314[5]
GHS precautionary statements P280, P305+351+338, P310[5]
NFPA 704
Flammability code 0: Will nae burn. E.g., watterHealth code 3: Short exposur could cause serious temporary or residual injury. E.g., chlorine gasReactivity code 1: Normally stable, but can acome unstable at elevatit temperaturs an pressurs. E.g., calciumSpecial hazards (white): no codeNFPA 704 four-colored diamond
0
3
1
Flash pynt Non-flammable
Lethal dose or concentration (LD, LC):
273 mg/kg (oral, rat)[6]
Relatit compoonds
Ither anions
Potassium hydrosulfide
Potassium amide
Ither cations
Lithium hydroxide
Sodium hydroxide
Rubidium hydroxide
Caesium hydroxide
Except whaur itherwise notit, data are gien for materials in thair staundart state (at 25 °C [77 °F], 100 kPa).
YesY verify (whit is YesYN ?)
Infobox references

Potassium hydroxide is an inorganic compoond wi the formula KOH, commonly cried caustic potash.

References[eedit | eedit soorce]

  1. 1.0 1.1 Lide, D. R., ed. (2005). CRC Handbook of Chemistry and Physics (86th ed.). Boca Raton (FL): CRC Press. p. 4-80. ISBN 0-8493-0486-5. 
  2. 2.0 2.1 2.2 2.3 2.4 2.5 http://chemister.ru/Database/properties-en.php?dbid=1&id=325
  3. Seidell, Atherton; Linke, William F. (1952). [Google Books Solubilities of Inorganic and Organic Compounds] Check |url= value (help). Van Nostrand. Retrieved 2014-05-29. 
  4. 4.0 4.1 Zumdahl, Steven S. (2009). Chemical Principles 6th Ed. Houghton Mifflin Company. p. A22. ISBN 0-618-94690-X. 
  5. 5.0 5.1 5.2 Sigma-Aldrich Co., Potassium hydroxide. Retrieved on 2014-05-18.
  6. http://chem.sis.nlm.nih.gov/chemidplus/rn/1310-58-3