Potassium carbonate

Potassium carbonate
Names
	IUPAC name Potassium carbonate
	Other names Carbonate of potash, dipotassium carbonate, sub-carbonate of potash, pearl ash, potash, salt of tartar, salt of wormwood.
Identifiers
CAS Number	584-08-7 ; 6381-79-9 sesquihydrate ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:131526 ;
ChemSpider	10949 ;
ECHA InfoCard	100.008.665
E number	E501(i) (acidity regulators, ...)
PubChem CID	11430;
RTECS number	TS7750000;
UNII	BQN1B9B9HA ; L9300DKS8U (sesquihydrate) ;
CompTox Dashboard (EPA)	DTXSID2036245 ;
	InChI InChI=1S/CH2O3.2K/c2-1(3)4;;/h(H2,2,3,4);;/q;2+1/p-2 Key: BWHMMNNQKKPAPP-UHFFFAOYSA-L ; InChI=1/CH2O3.2K/c2-1(3)4;;/h(H2,2,3,4);;/q;2+1/p-2 Key: BWHMMNNQKKPAPP-NUQVWONBAS;
	SMILES C(=O)([O-])[O-].[K+].[K+];
Properties
Chemical formula	K; 2CO; 3
Molar mass	138.205 g/mol
Appearance	White, hygroscopic solid
Density	2.43 g/cm3
Melting point	891 °C (1,636 °F; 1,164 K)
Boiling point	Decomposes
Solubility in water	110.3 g/100 mL (20 °C) ; 149.2 g/100 mL (100 °C)
Solubility	3.11 g/100 mL (25 °C) methanol; Insoluble in alcohol, acetone;
Acidity (pKa)	10.25
Magnetic susceptibility (χ)	−59.0·10−6 cm3/mol
Thermochemistry
Heat capacity (C)	114.4 J·mol−1·K−1
Std molar; entropy (S⦵298)	155.5 J·mol−1·K−1
Std enthalpy of; formation (ΔfH⦵298)	−1151.0 kJ·mol−1
Gibbs free energy (ΔfG⦵)	−1063.5 kJ·mol−1
Enthalpy of fusion (ΔfH⦵fus)	27.6 kJ·mol−1
Hazards
	GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H302, H315, H319, H335
Precautionary statements	P261, P305+P351+P338
NFPA 704 (fire diamond)	2 0 0
Flash point	Non-flammable
	Lethal dose or concentration (LD, LC):
LD50 (median dose)	1870 mg/kg (oral, rat)
Safety data sheet (SDS)	ICSC 1588
Related compounds
Other anions	Potassium bicarbonate
Other cations	Lithium carbonate; Sodium carbonate; Rubidium carbonate; Caesium carbonate
Related compounds	Ammonium carbonate
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Potassium carbonate is the inorganic compound with the formula K₂ CO₃. It is a white salt, which is soluble in water and forms a strongly alkaline solution. It is deliquescent, often appearing as a damp or wet solid. Potassium carbonate is mainly used in the production of soap and glass.^[3] Commonly, it can be found as the result of leakage of alkaline batteries.^[4]

^ CRC handbook of chemistry and physics: a ready-reference book of chemical and physical data. William M. Haynes, David R. Lide, Thomas J. Bruno (2016-2017, 97th ed.). Boca Raton, Florida. 2016. ISBN 978-1-4987-5428-6. OCLC 930681942.{{cite book}}: CS1 maint: location missing publisher (link) CS1 maint: others (link)
^ Chambers, Michael. "ChemIDplus - 584-08-7 - BWHMMNNQKKPAPP-UHFFFAOYSA-L - Potassium carbonate [USP] - Similar structures search, synonyms, formulas, resource links, and other chemical information". chem.sis.nlm.nih.gov. Archived from the original on 2014-08-12.
^ H. Schultz; G. Bauer; E. Schachl; F. Hagedorn; P. Schmittinger (2005). "Potassium Compounds". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a22_039. ISBN 3-527-30673-0.
^ List, Jenny (October 19, 2022). "Crusty Leaking Cells Kill Your Tech. Just What's Going On?". Hackaday. Archived from the original on May 30, 2023.

[1] CRC handbook of chemistry and physics: a ready-reference book of chemical and physical data. William M. Haynes, David R. Lide, Thomas J. Bruno (2016-2017, 97th ed.). Boca Raton, Florida. 2016. ISBN 978-1-4987-5428-6. OCLC 930681942.{{cite book}}: CS1 maint: location missing publisher (link) CS1 maint: others (link)

[2] Chambers, Michael. "ChemIDplus - 584-08-7 - BWHMMNNQKKPAPP-UHFFFAOYSA-L - Potassium carbonate [USP] - Similar structures search, synonyms, formulas, resource links, and other chemical information". chem.sis.nlm.nih.gov. Archived from the original on 2014-08-12.

[Ullmann-3] H. Schultz; G. Bauer; E. Schachl; F. Hagedorn; P. Schmittinger (2005). "Potassium Compounds". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a22_039. ISBN 3-527-30673-0.

[4] List, Jenny (October 19, 2022). "Crusty Leaking Cells Kill Your Tech. Just What's Going On?". Hackaday. Archived from the original on May 30, 2023.

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