Methyl isobutyl ketone

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Methyl isobutyl ketone

General
Systematic name 2-Methylpentan-4-one
Other names Isopropylacetone
Hexone
Molecular formula C₆H₁₂O
SMILES CC(C)CC(=O)C
Molar mass 100.2 g/mol
Appearance colorless liquid
CAS number [108-10-1]
Properties
Density and phase 0.80 g/ml, liquid
Solubility in water 1.91 g/100 ml (20 °C)
Melting point −84.7 °C
Boiling point 117–18 °C
Acidity (pK_a) ?
Viscosity ? cP at ? °C
Dipole moment ? D
Hazards
MSDS External MSDS
EU classification Flammable (F)
Harmful (Xn)
NFPA 704
R-phrases R11, R20, R36/37, R66
S-phrases S2, S9, S16, S29
Flash point 14 °C
RTECS number SA9275000
Supplementary data page
Structure and
properties n, ε_r, etc.
Thermodynamic
data Phase behaviour
Solid, liquid, gas
Spectral data UV, IR, NMR, MS
Related compounds
Related ketones Methyl isopropyl ketone
Pentan-2-one
Related compounds 2-Methylpentan-4-ol
Except where noted otherwise, data are given for
materials in their standard state (at 25 °C, 100 kPa)
[Chemical infoboxInfobox disclaimer and references]

Methyl isobutyl ketone or MIBK, has a variety of alternative names:

Isobutyl methyl ketone
Isopropylacetone
4-Methylpentan-2-one
4-Methyl-2-pentanone

It is a ketone that is widely used as a solvent. Unlike the other common ketone solvents, acetone and MEK, MIBK has quite low solubility in water, allowing it to be used for liquid-liquid extraction. It has a similar polarity to the ester solvent ethyl acetate, but higher stability towards aqueous acid or base than ethyl acetate.

Methyl isobutyl ketone is manufactured from acetone, via a three-step process. Firstly acetone is dimerised via the aldol condensation to give diacetone alcohol, which readily dehydrates to give mesityl oxide. Mesityl oxide can then be hydrogenated to give MIBK.

Uses

It is used as a solvent for CS in the preparation of the CS spray used currently by British police forces. [Response to BMJ editorial] Peter J Gray (25 February 2000)

References

External links

[Rohmhaas.com]
[ChemIndustry.com, Inc.] MiBK Resource Page.

For a full list of external links to MSDSs, spectroscopic data, commercial chemicals suppliers etc. for this compound, see [Chemical sources].

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Methyl isobutyl ketone

General
Systematic name	2-Methylpentan-4-one
Other names	Isopropylacetone Hexone
Molecular formula	C₆H₁₂O
SMILES	CC(C)CC(=O)C
Molar mass	100.2 g/mol
Appearance	colorless liquid
CAS number	[108-10-1]
Properties
Density and phase	0.80 g/ml, liquid
Solubility in water	1.91 g/100 ml (20 °C)
Melting point	−84.7 °C
Boiling point	117–18 °C
Acidity (pK_a)	?
Viscosity	? cP at ? °C
Dipole moment	? D
Hazards
MSDS	External MSDS
EU classification	Flammable (F) Harmful (Xn)
NFPA 704
R-phrases	R11, R20, R36/37, R66
S-phrases	S2, S9, S16, S29
Flash point	14 °C
RTECS number	SA9275000
Supplementary data page
Structure and properties	n, ε_r, etc.
Thermodynamic data	Phase behaviour Solid, liquid, gas
Spectral data	UV, IR, NMR, MS
Related compounds
Related ketones	Methyl isopropyl ketone Pentan-2-one
Related compounds	2-Methylpentan-4-ol
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) [Chemical infoboxInfobox disclaimer and references]