Butanone
Butanone, also called methyl ethyl ketone (MEK), is an organic compound with the chemical formula CH3C(O)CH2CH3. It is a simple ketone with four carbon atoms. It smells sharp and sweet, like butterscotch and acetone mixed. It is soluble in water and is used as a solvent.
| Names | |
|---|---|
| Preferred IUPAC name
Butan-2-one[2] | |
Other names
| |
| Identifiers | |
| CAS number | |
| PubChem | |
| KEGG | C02845 |
| ChEBI | CHEBI:28398 |
| RTECS number | EL6475000 |
| SMILES | O=C(C)CC |
| Beilstein Reference | 741880 |
| Gmelin Reference | 25656 |
| Properties | |
| Molecular formula | C4H8O |
| Molar mass | 72.1 g mol-1 |
| Appearance | Colorless liquid |
| Odor | Mint or acetone-like[3] |
| Density | 0.8050 g/mL |
| Melting point |
−86 °C, 187 K, -123 °F |
| Boiling point | |
| Solubility in water | 27.5 g/100 mL |
| log P | 0.37[4] |
| Vapor pressure | 78 mmHg (20 °C)[3] |
| Acidity (pKa) | 14.7 |
| −45.58·10−6 cm3/mol | |
| Refractive index (nD) | 1.37880 |
| Viscosity | 0.43 cP |
| Structure | |
| Dipole moment | 2.76 D |
| Hazards | |
| EU classification | Flammable (F) Irritant (Xi) |
| NFPA 704 |
3
1
0
|
| R-phrases | R11 R36 R66 R67 |
| S-phrases | (S2) S9 S16 |
| Explosive limits | 1.4–11.4%[3] |
| U.S. Permissible exposure limit (PEL) |
TWA 200 ppm (590 mg/m3)[3] |
Butanone Media
Preparation of dimethylglyoxime
Pechiney-Ugine-Kuhlmann process
References
- ↑ Merck Index, 11th Edition, 5991.
- ↑ 2.0 2.1 2.2 Nomenclature of Organic Chemistry : IUPAC Recommendations and Preferred Names 2013 (Blue Book) (2014). Cambridge: The Royal Society of Chemistry. p. 725. ISBN 978-0-85404-182-4. doi:10.1039/9781849733069-FP001.
- ↑ 3.0 3.1 3.2 3.3 NIOSH Pocket Guide to Chemical Hazards. #0069National Institute for Occupational Safety and Health (NIOSH).
- ↑ butan-2-one_msds.