Acetone
Preferred IUPAC name Propan-2-one
Other names	Acetone Dimethyl ketone Dimethyl carbonyl β-Ketopropane Propanone 2-Propanone Dimethyl formaldehyde Pyroacetic spirit (archaic) Ketone propane
Identifiers
CAS number	67-64-1
PubChem	180
EC number	200-662-2
KEGG	D02311
MeSH	Acetone
ChEBI	CHEBI:15347
RTECS number	AL3150000
SMILES	CC(=O)C
InChI InChI=1/C3H6O/c1-3(2)4/h1-2H3
Beilstein Reference	635680
Gmelin Reference	1466
3DMet	B00058
Properties
Molecular formula	C3H6O
Molar mass	58.07 g mol-1
Appearance	Colorless liquid
Odor	Pungent, irritating, floral, cucumber like
Density	0.7845 g/cm3 (25 °C)
Melting point	−94.7 °C, 178 K, -138 °F
Boiling point
Solubility in water	Miscible
Solubility	Miscible in benzene, diethyl ether, methanol, chloroform, ethanol
log P	-0.16
Vapor pressure	9.39 kPa (0 °C) 30.6 kPa (25 °C) 374 kPa (100 °C) 2.8 MPa (200 °C)
Acidity (pKa)	19.16 (H2O) 26.5 (DMSO)
Magnetic susceptibility (χ)	−33.78·10−6 cm3/mol
Refractive index (nD)	1.3588 (VD = 54.46)
Viscosity	0.295 mPa·s (25 °C)
Structure
Coordination geometry	Trigonal planar at C2
Molecular shape	Dihedral at C2
Dipole moment	2.91 D
Thermochemistry
Std enthalpy of formation ΔfHo298	(−250.03) – (−248.77) kJ/mol
Std enthalpy of combustion ΔcHo298	−1.772 MJ/mol
Standard molar entropy So298	200.4 J/(mol·K)
Specific heat capacity, C	125.45 J/(mol·K)
Hazards
NFPA 704	3 1 0
Explosive limits	2.6–12.8%
U.S. Permissible exposure limit (PEL)	1000 ppm (2400 mg/m3)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)

Acetone, or propanone, is an organic compound with the chemical formula (CH3)2CO. This clear, mobile, easy-to-burn liquid is the simplest example of the ketones. Acetone can be mixed with water. It is an important solvent, often to clean things in the laboratory. Common uses of acetone in the home are as the active ingredient in nail polish remover and as paint thinner. It is a common building block in organic chemistry. view more...