CAS Number: 78‑93‑3
Synonyms: Methyl ethyl ketone; MEK; 2-butanone; ethyl methyl ketone; methylpropanone; methylacetone
Chemical Formula :C₄H₈O
Molecular Weight:72.11 g/mol
Product Introduction
A colorless, volatile liquid with a sharp, sweet, acetone-like odor. Partially water-soluble and widely used industrially as a solvent in coatings, adhesives, inks, and degreasing applications—also a precursor in MEK peroxide for unsaturated polyester resins.
| Property | Value |
|---|---|
| Appearance | Colorless liquid |
| Odor | Sharp, sweet, acetone-like |
| Density @ 20 °C | 0.805 g/mL |
| Melting Point | −86 °C |
| Boiling Point | 79.6 °C |
| Flash Point (CC) | −9 °C |
| Vapor Pressure @ 20 °C | ≈77 mm Hg |
| Refractive Index (n₂₀ᴅ) | 1.3788 |
| Solubility in Water @ 20 °C | ~24–27.5 g/100 mL |
| Dipole Moment | 2.76 D |
| Explosion Limits | 1.4–11.4 vol % |