28 Sep 2015


Butanone, also known as methyl ethyl ketone or MEK, is an organic compound with the formula CH3C(O)CH2CH3. This colorless liquid ketonehas a sharp, sweet odor reminiscent of butterscotch and acetone. It is produced industrially on a large scale, and also occurs in trace amounts in nature. It is soluble in water and is commonly used as an industrial solvent. Methyl Ethyl Ketone (MEK) is a water white, highly volatile liquid having Acetone-like odour with no cumulative toxicological properties. it is used as an intermediate in a number of chemical products, such as Aroma Chemicals.

Specifications :

Molecular weight 72.11
Boiling point 79.64°C
Vapor pressure 74 Torr at 20°C
Freezing point -86.69°C
Refractive index 1.3788 at 20°C
Density 0.8049 g/mL (6.717 lb/gal) at 20°C
0.7997 g/mL (6.673 lb/gal) at 25°C
Dielectric constant 18.51 at 20°C
Dipole moment 2.76 D at 25°C
Solvent group 6
Polarity index (P’) 4.7
Eluotropic value on alumina 0.51
Viscosity 0.43 cP at 20°C
Surface tension 24.0 dyn/cm at 25°C
Solubility in water 24.0% at 20°C
Solubility of water in methyl ethyl ketone 10.0% at 20°C
Regulatory and Safety Data
DOT Hazard Class 3, Flammable Liquid
Packing Group II
UN Identification Number UN1193
Storage Store in an area designed for flammable storage, or in an approved metal cabinet, away from direct sunlight, heat and sources of ignition.
EPA applicable waste code(s) U159, F005, D035
Flash point 16°F (-9°C) by closed cup
Lower explosive limit 1.40%
Upper explosive limit 11.40%
Time Weighted Average 200 ppm ACGIH

Applications :

  • Lubricating oil dewaxing
  • Adhesives
  • Printing Inks
  • Magnetic Audio Video tapes
  • Polyurethane resins
  • Artificial Leather
  • PVC film/Leather cloth industry
  • Specialty Paints
  • MEK Oxime manufacture
  • MEK Peroxide manufacture
  • Aroma Chemicals such as Methyl Pentanone
  • Degreasing of metal surfaces, particularly Aircraft parts
  • Epoxy glass laminates for the electronic industry

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