Acetone

Acetone
IUPAC name	Propanone
Systematic name Propan-2-one
Other names	Dimethyl ketone β-Ketopropane Propanone 2-Propanone Dimethyl formaldehyde Pyroacetic spirit (archaic)
Identifiers
Abbreviations	DMK
CAS number	67-64-1
PubChem	180
EC number	200-662-2
KEGG	D02311
MeSH	Acetone
ChEBI	CHEBI:15347
RTECS number	AL3150000
SMILES	CC(C)=O
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
Density	0.791 g cm−3
Melting point	-95--93 °C, 178-180 K, -139--136 °F
Boiling point	56-57 °C, 329-330 K, 133-134 °F
log P	-0.042
Vapor pressure	24.46–24.60 kPa (at 20 °C)
Acidity (pKa)	24.2
Basicity (pKb)	-10.2
Refractive index (nD)	1.35900
Viscosity	0.3075 cP
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−1
Std enthalpy of combustion ΔcHo298	-1.772 MJ mol−1
Standard molar entropy So298	200.4 J K−1 mol−1
Specific heat capacity, C	125.45 J K−1 mol−1
Hazards
EU classification	F Xi
EU Index	606-001-00-8
NFPA 704	3 1 0
Flash point	−17 °C
Autoignition temperature	465 °C
Explosive limits	13.2–57.0%
Related compounds
Related compounds	Butanone Isopropanol
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)

Acetone is the organic compound with the formula (CH3)2CO. This colorless, mobile, flammable liquid is the simplest example of the ketones. Acetone can be mixed with water and serves as an important solvent in its own right, typically as the solvent of choice for cleaning purposes in the laboratory. Familiar household uses of acetone are as the active ingredient in nail polish remover and as paint thinner. It is a common building block in organic chemistry.