78-93-3

  • English Name: 2-Butanone
  • CAS Number: 78-93-3
  • Molecular Formula: C₄H₈O
  • Molecular Weight: 72.11 g/mol

Physical Properties

  • Appearance: Colorless liquid with an odor similar to acetone.
  • Melting Point: -87°C.
  • Boiling Point: 79.6°C.
  • Density: 0.805 g/mL at 25°C.
  • Solubility: Soluble in water (290 g/L at 20°C), ethanol, and ether.
  • Flash Point: -6°C.
  • Refractive Index: n₂₀/D 1.379.
  • Vapor Pressure: 71 mm Hg at 20°C.

Chemical Properties

  • Stability: Stable, but highly flammable. Incompatible with oxidizing agents, bases, and strong reducing agents.
  • Reactivity: Forms explosive mixtures with air; explosive limits are 1.7% to 11.4%.

Uses

  • Solvent: Widely used in paints, coatings, resins, and as a solvent in the extraction of plant oils.
  • Lubricant Additive: Used as a dewaxing agent in lubricants.
  • Organic Synthesis: Important intermediate in the synthesis of pharmaceuticals, pesticides, and other chemicals.

Safety Information

  • Health Hazards: Causes irritation to eyes, skin, and mucous membranes. Long-term exposure may lead to dermatitis.
  • Flammability: Highly flammable; forms explosive mixtures with air.
  • Risk Phrases: R11 (Highly flammable), R36 (Irritating to eyes), R66 (Repeated exposure may cause skin dryness or cracking), R67 (Vapors may cause drowsiness and dizziness).
  • Safety Phrases: S16 (Keep away from sources of ignition), S9 (Keep container in a well-ventilated place).

Handling and Storage

  • Store in a cool, well-ventilated area, away from sources of ignition and oxidizing agents.
  • Use appropriate ventilation when handling.

Packing and shipping