Potassium acetate

Potassium acetate
Names
	Preferred IUPAC name Potassium acetate
	Other names Potassium ethanoate, E261
Identifiers
CAS Number	127-08-2 ;
3D model (JSmol)	Interactive image;
ChEMBL	ChEMBL1201058 ;
ChemSpider	29104 ;
ECHA InfoCard	100.004.385
E number	E261 (preservatives)
PubChem CID	31371;
UNII	M911911U02 ;
CompTox Dashboard (EPA)	DTXSID7027043 ;
	InChI InChI=1S/C2H4O2.K/c1-2(3)4;/h1H3,(H,3,4);/q;+1/p-1 Key: SCVFZCLFOSHCOH-UHFFFAOYSA-M ; InChI=1/C2H4O2.K/c1-2(3)4;/h1H3,(H,3,4);/q;+1/p-1 Key: SCVFZCLFOSHCOH-REWHXWOFAA;
	SMILES CC(=O)[O-].[K+];
Properties
Chemical formula	C2H3KO2
Molar mass	98.142 g·mol−1
Appearance	White deliquescent crystalline powder
Density	1.8 g/cm3 (20 °C); 1.57 g/cm3 (25 °C)
Melting point	292 °C (558 °F; 565 K)
Boiling point	Decomposes
Solubility in water	216.7 g/100 mL (0.1 °C); 233.8 g/100 mL (10 °C); 268.6 g/100 mL (25 °C); 320.8 g/100 mL (40 °C); 390.7 g/100 mL (96 °C)
Solubility	Soluble in alcohol, liquid ammonia; Insoluble in ether, acetone
Solubility in methanol	24.24 g/100 g (15 °C); 53.54 g/100 g (73.4 °C)
Solubility in ethanol	16.3 g/100 g
Solubility in sulfur dioxide	0.06 g/kg (0 °C)
Acidity (pKa)	4.76
Structure
Crystal structure	Monoclinic
Thermochemistry
Heat capacity (C)	109.38 J/mol·K
Std molar; entropy (S⦵298)	150.82 J/mol·K
Std enthalpy of; formation (ΔfH⦵298)	−722.6 kJ/mol
Pharmacology
ATC code	B05XA17 (WHO)
Hazards
NFPA 704 (fire diamond)	1 1 0
	Lethal dose or concentration (LD, LC):
LD50 (median dose)	3250 mg/kg (oral, rat)
	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 acetate (also called potassium ethanoate), (CH₃COOK) is the potassium salt of acetic acid. It is a hygroscopic solid at room temperature.