Methyl isobutyl ketone
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| Methyl isobutyl ketone | |
|---|---|
 |
|
| General | |
| Systematic name | 2-Methylpentan-4-one |
| Other names | Isopropylacetone Hexone Isobutyl methyl ketone Isopropylacetone 4-Methylpentan-2-one 4-Methyl-2-pentanone |
| 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 | 117-118 °C |
| Acidity (pKa) | ? |
| Viscosity | 0.58 cP at 20.0 °C |
| Dipole moment | 4.2 D |
| Hazards | |
| MSDS | External MSDS |
| EU classification | Flammable (F) Harmful (Xn) |
| NFPA 704 |
3
2
0
|
| 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, εr, 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) Infobox disclaimer and references |
|
Methyl isobutyl ketone (MIBK) 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.
[edit] Uses
It is used as a solvent for CS in the preparation of the CS spray used currently by British police forces. [1]
[edit] References
- ^ Response to BMJ editorial Peter J Gray (25 February 2000)
