3-Methyl-2-butanone

3-methyl-2-butanone, also called methyl isopropyl ketone (MIPK), is an organic compound. It is a ketone with 4 carbon atoms on the main chain and a methyl group coming off the third carbon atom.

3-Methyl-2-butanone
IUPAC name	3-Methyl-2-butanone
Other names	Isopropyl methyl ketone, MIPK, 2-Acetyl propane 3-Methyl-2-butanone
Identifiers
CAS number	563-80-4
PubChem	11251
EC number	209-264-3
SMILES	CC(C)C(=O)C
InChI InChI=1/C5H10O/c1-4(2)5(3)6/h4H,1-3H3
Properties
Molecular formula	C5H10O
Molar mass	86.13 g/mol
Appearance	Colorless liquid
Odor	Acetone-like
Density	0.803 g/cm³ (20 °C)
Melting point	−92 °C, 181 K, -134 °F
Boiling point
Solubility in water	6-8.2 g/l (20 °C)
Vapor pressure	8.6 kPa (20 °C)
Magnetic susceptibility (χ)	-58.45·10−6 cm3/mol
Refractive index (nD)	1.389 (20 °C)
Viscosity	0.48 mPa·s (20 °C)
Hazards
Flash point	5 °C (41 °F)
U.S. Permissible exposure limit (PEL)	none
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)

Like butanone it can be used as a solvent. It costs more to make, so is not used very often.