Methyl ethyl ketone
CAS 78-93-3C4H8O72.11 g/mol
Butan-2-one is a dialkyl ketone that is a four-carbon ketone carrying a single keto- group at position C-2. It has a role as a polar aprotic solvent and a bacterial metabolite. It is a volatile organic compound, a dialkyl ketone, a butanone and a methyl ketone.
IUPAC: butan-2-one
PubChem
Physical & Chemical Properties
| Melting Point | -123.3 °F (NTP, 1992) |
| Boiling Point | 175.3 °F at 760 mmHg (NTP, 1992) |
| Density | 0.806 at 68 °F (USCG, 1999) - Less dense than water; will float |
| Solubility | greater than or equal to 100 mg/mL at 66 °F (NTP, 1992) |
| Flash Point | 26 °F (NTP, 1992) |
| Vapor Pressure | 77.5 mmHg at 68 °F ; 100 mmHg at 77.0 °F (NTP, 1992) |
| Appearance | Methyl ethyl ketone appears as colorless fairly volatile liquid with a pleasant pungent odor. Flash point 20 °F. Vapors heavier than air. Does not react with water or many common materials. Stable in normal transportation. Irritates the nose, eyes, and throat. Combustion may produce toxic materials. Density 6.7 lb / gal. Used as a solvent, for making other chemicals, and for production of wax from petroleum. |
Data: PubChem · Last updated: 4/20/2026
GHS Classification
No GHS classification data available.
Classification data is sourced from ECHA.
Regulatory Compliance
TSCA
Listed
note: Status based on EPA TSCA Active Inventory · inventory name: TSCA Chemical Substance Inventory
View sourceGlobal Trade Intelligence
No trade flow data available for this chemical.
HS Code(s): 2914
Data: UN Comtrade
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