Carbon monoxide

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An odorless, colorless, tasteless, and highly poisonous gas. Carbon monoxide is produced by the incomplete combustion of carbon containing materials. It is used in organic synthesis and metallurgy.

Synonyms and Related Terms

carbon oxide; carbonic oxide; monoxyde de carbone (Fr.)


  • Very toxic by inhalation. Good ventilation should always be used with furnaces, kilns, stoves, gas engines and space heaters.
  • Very flammable. Forms explosive mixture when mixed with air.
  • Airgas: SEDS

Physical and Chemical Properties

  • Soluble in ethanol and some organic solvents. Slightly soluble in water.
  • Burns with a light blue flame.
Composition CO
CAS 630-08-0
Melting Point -205.0 C
Molecular Weight mol. wt. = 28.0
Boiling Point -191.5

Physical and Chemical Properties

  • G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 144
  • Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
  • Van Nostrand's Scientific Encyclopedia, Douglas M. Considine (ed.), Van Nostrand Reinhold, New York, 1976
  • 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 1861
  • The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998
  • Hermann Kuhn, Conservation and Restoration of Works of Art and Antiquities, Butterworths, London, 1986
  • Michael McCann, Artist Beware, Watson-Guptill Publications, New York City, 1979