Gamma-Octalactone
Synthetic
Fruity > Lactonic > Coconut > Coumarinic > Green
Crédits photo: ScenTree SAS
Other names :
Octano-1,4-lactone ; 5-butyl tetrahydro-2-furanone ; 4-butyl-gamma-butyrolactone ; 5-butyloxolan-2-one ; Octan-4-olide ; Octano-1,4-lactone ; 4-octanolide
Volatility :
Base
Uses in perfumery :
Gamma-Octalactone is used in peach and coconut reconstitutions for its milky note, and in heavy floral accords as tuberose and jasmine.
Natural availability :
Gamma-Octalactone is found in the odoriferous principle of some processed and unprocessed food (apricot, peach, pineapple, blue cheese…), but does not exist on a natural state.
Year of discovery :
Data not available.
Other comments :
Data not available.
Price Range :
€€
Stability :
Lactones tend to polymerize through time, making them more viscous and leading to a phase shift in alcohol.
Crédits photo: ScenTree SAS
- Molecular formula :
- C8H14O2
- Molecular Weight :
- 142.2 g/mol
- Density :
- 0.98
- Flash Point :
- 232°F (111°C)
- Fusion Point :
- Data not available.
- Appearance :
- Colorless liquid
- Log P :
- Data not available.
- Boiling Point :
- 453°F (234°C)
- Detection Threshold :
- Gamma-Octalactone has a very low detection threshold of a few ppb (parts per billion). that is in the order of 0.0000001%. A use in very small quantity is enough to detect its effects.
Synthesis route :
Gamma-Octalactone is a cyclic lactone, synthesized as every other lactones. A reaction between acrylic acid and pentanol, in the presence of an alkaline sulfate or phosphate, ables to synthesize this molecule. An intramolecular esterification of 4-hydroxyoctanoic acid, catalized by a strong acid as sulfuric acid, also ables to obtain this compound. Eventually, biochemical synthesis routes are being studied.
Synthesis precursor :
Gamma-Octalactone is not used for the synthesis of another molecule of olfactive interest.
Isomerism :
Gamma-Octalactone has an asymmetric carbon, giving birth to two possible enantiomers. Nevertheless, a blend of these enantiomers is used in perfumery.
Delta-Octalactone is a constitutional isomer of this molecule, but has a more woody and less milky note.
- EINECS number :
- 203-208-1
- FEMA number :
- 2796
- JECFA number :
- 226
- FLAVIS number :
- 10.022
- Allergens :
- This ingredient does not contain any allergen.
- IFRA :
- This ingredient is not restricted
To learn more about IFRA's standards : https://ifrafragrance.org/safe-use/library
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