2-butanone

Synonyms

• methyl ethyl ketone
• mek
• methyl acetone
• 2-oxybutane

• CAS Format: C4H8O
• Structural: CH3COCH2CH3

• Molecular Weight: 72
• Vapor pressure at 20oC (mm Hg): 77.5
• Vapor density: 2.42
• Melting point oC : -86
• Boiling point oC : 79.6
• Flash point oC : -6
• Lower explosive limit: 2 %
• Upper explosive limit: 10 %
• Solubility in water at 20oC: 27.5%
• Specific Gravity: 0.805

Registry Numbers

• Chemical Abstracts: 78-93-3
• RTECS: EL6475000
• NFPA Ratings
  • Health: 1
  • Flammability: 3
  • Reactivity: 0
• DOT
  • 1193
  • 1232

Description Clear, colorless liquid with acetone-like odor.

Incompatabilities Strong oxidizers, chlorosulfonic acid, oleum, hydrogen peroxide, nitric acid, 2-propanol.