Methyl isobutyl ketone

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A colorless liquid solvent with an acetone-like odor. Methyl isobutyl ketone is used as a solvent for Cellulose nitrate, gums, resins, fats, waxes, and oils. It is used commercially in paints, varnishes, and lacquers and as a denaturant for ethanol.

Synonyms and Related Terms

MIBK; hexone; 4-methyl-2-pentanone; isopropylacetone

Chemical structure

Methyl isobutyl ketone.jpg

Other Properties

Miscible in most organic solvents. Slightly soluble in water.

Composition (CH3)2CHCH2OCH3
CAS 108-10-1
Melting Point -85
Density 0.8061
Molecular Weight mol. wt. = 100.16
Refractive Index 1.3861
Boiling Point 116-117

Hazards and Safety

Flammable. Flash point 14C (57F). Dangerous fire risk. Explosive limits in air 1.4-7.5%.

Moderate toxicity by inhalation, ingestion and skin absorption.

Mallinckrodt Baker: MSDS

Sources Checked for Data in Record

  • R. J. Gettens, G.L. Stout, Painting Materials, A Short Encyclopaedia, Dover Publications, New York, 1966
  • Reed Kay, The Painter's Guide To Studio Methods and Materials, Prentice-Hall, Inc., Englewood Cliffs, NJ, 1983
  • Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
  • Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997
  • The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 6164

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