Терпінілацетат

Chemistry

The CAS Registry Number of alpha-terpinyl acetate is 80-26-2. Its molecular formula is C₁₂H₂₀O₂ and its molecular weight is 196.29. The IUPAC name of alpha-terpinyl acetate is 2-(4-methylcyclohex-3-en-1-yl)propan-2-yl acetate. Commercial terpinyl acetate consists mainly of alpha-terpinyl acetate and also contains other isomers such as beta-terpinyl acetate. It has FEMA number 3047 and JECFA number 368.

Physical properties

Terpinyl acetate is soluble in alcohol, most fixed oils, propylene glycol and mineral oil, and slightly soluble in glycerol. It is insoluble in water.

Natural occurrence

Terpinyl acetate is reported in over 40 essential oils, including cypress, Malabar cardamom, cajeput niaouli, Siberian pine needles and pine. It has also been identified in the essential oils of bitter orange. The enantiomers and the racemate occur in many essential oils, but generally not as the main component. In an essential oil from the seeds of Elettaria cardamomum, terpineol acetate is above 35% and is among the most prevalent compounds. A GC-MS analysis of a green cardamom sample found α-terpinyl acetate at 34.95%, while a black cardamom sample obtained by SFE gave 12.25%. The primary volatile components of Elettaria cardamomum are terpinyl acetate and eucalyptol. Terpinyl acetate is a metabolite found in or produced by Saccharomyces cerevisiae.

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