Jump to: navigation, search


A colorless, volatile liquid obtained from the reaction of acetaldehyde and ethyl alcohol. Acetal has a pleasing odor and a nutlike aftertaste. It is used as a solvent, and as an ingredient in cosmetics, perfumes (such as jasmine) and flavorings.

Synonyms and Related Terms

diethylacetal; 1,1-diethoxyethane; ethylidenediethyl ether; acetaldehyde diethyl acetal

Chemical structure


Other Properties

Soluble in hexane, ethanol and ethyl acetate. Slightly soluble in water.

Composition CH3CH(OC2H5)2
CAS 105-57-7
Melting Point -100
Density 0.8254
Molecular Weight mol. wt. = 118.18
Refractive Index 1.379-1.385
Boiling Point 102.7

Hazards and Safety

Highly flammable. Flash point = -12C. Sensitive to light, moisture and heat. May form explosive peroxides. Contact causes irritation. Narcotic in high concentrations.

Fisher Scientific: MSDS

Sources Checked for Data in Record

  • Van Nostrand's Scientific Encyclopedia, Douglas M. Considine (ed.), Van Nostrand Reinhold, New York, 1976
  • G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971
  • Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993