Potassium hydroxide

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

Potassium hydroxide

Names
IUPAC name Potassium hydroxide
Ither names Caustic potash, Potash lye, Potassia, Potassium hydrate
Identifiers
CAS Nummer	1310-58-3 Y
3D model (JSmol)	Interactive eemage
ChEBI	CHEBI:32035 Y
ChemSpider	14113 Y
EC Nummer	215-181-3
PubChem CID	14797
RTECS nummer	TT2100000
UNII	WZH3C48M4T Y
UN nummer	1813
InChI InChI=1S/K.H2O/h;1H2/q+1;/p-1 Y Key: KWYUFKZDYYNOTN-UHFFFAOYSA-M Y InChI=1/K.H2O/h;1H2/q+1;/p-1 Key: KWYUFKZDYYNOTN-REWHXWOFAT
SMILES [K+].[OH-]
Properties
Chemical formula	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)
Solubility in watter	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
Creestal 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]
Gibbs free energy (ΔfG˚)	-380.2 kJ/mol[2]
Hazards
GHS pictograms	[5]
GHS signal wird	Danger
GHS hazard statements	H302, H314[5]
GHS precautionary statements	P280, P305+351+338, P310[5]
NFPA 704	0 3 1
Flash pynt	Non-flammable
Lethal dose or concentration (LD, LC):
LD50 (Median dose)	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).
Y verify (whit is YN ?)
Infobox references