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A colorless liquid with a pungent smell. Butyraldehyde is produced by oxidizing butanol. It is used as a plasticizer and solvent.

Synonyms and Related Terms

butanal (IUPAC); butyl aldehyde; butaldehyde; butanaldehyde; butal; butyric aldehyde


  • Flammable. Flash point=-6.6C (20F)
  • ThermoFisher: SDS

Physical and Chemical Properties

Slightly soluble in water. Soluble in alcohol and ether.

Composition CH3CH2CH2CHO
CAS 123-72-8
Density 0.8048 g/ml
Refractive Index 1.378
Boiling Point 75.7 C

Resources and Citations

  • Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
  • CRC Handbook of Chemistry and Physics, Robert Weast (ed.), CRC Press, Boca Raton, Florida, v. 61, 1980