γ-Lactone

γ-Lactones are a family of organic compounds with the formula cyclo-O=COCHRCH2CH2. The parent member is γ-butyrolactone (R = H). A commercially important set of γ-lactones are derived from the free radical addition of fatty alcohols and acrylic acid. They are all weakly volatile liquids, which are colorless when pure, but typical samples are not.

Some γ-lactone fragrances
Name Formula Registry number Notes
γ-Octalactone C8H14O2 104-50-7 fruity
γ-Nonalactone C9H16O2 104-61-0 coconut-like
γ-Decalactone C10H18O2 706-14-9 peach flavors
γ-Undecalactone C11H20O2 104-67-6 peach flavors
β-Methyl-γ-octalactone C9H16O2 39212-23-2 whisky lactone
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