Potassium hydroxide

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Potassium hydroxide
Crystal structur o KOH
Pellets o potassium hydroxide
IUPAC name
Potassium hydroxide
Ither names
Caustic potash, Potash lye, Potassia, Potassium hydrate
3D model (JSmol)
EC Nummer 215-181-3
RTECS nummer TT2100000
UN nummer 1813
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)
Speceefic heat capacity, C 65.87 J/mol·K[2]
Staundart molar
79.32 J/mol·K[4][2]
Std enthalpy o
-425.8 kJ/mol[4][2]
-380.2 kJ/mol[2]
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
NFPA 704 four-colored diamondFlammability 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 code
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).
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Infobox references

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

References[eedit | eedit soorce]

  1. a b 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. a b c d e f "Archived copy". Archived frae the original on 18 Mey 2014. Retrieved 11 September 2014.CS1 maint: archived copy as title (link)
  3. Seidell, Atherton; Linke, William F. (1952). [Google Books Solubilities of Inorganic and Organic Compounds] Check |url= value (help). Van Nostrand. Retrieved 29 Mey 2014.
  4. a b Zumdahl, Steven S. (2009). Chemical Principles 6th Ed. Houghton Mifflin Company. p. A22. ISBN 0-618-94690-X.
  5. a b c Sigma-Aldrich Co. Retrieved on 2014-05-18.
  6. http://chem.sis.nlm.nih.gov/chemidplus/rn/1310-58-3