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HomeProduct name listWhiskey lactone

Whiskey lactone

Synonym(s):(±)-5-Butyl-4-methyldihydro-2(3H)-furanone

  • CAS NO.:39212-23-2
  • Empirical Formula: C9H16O2
  • Molecular Weight: 156.22
  • MDL number: MFCD00209540
  • EINECS: 254-357-4
  • SAFETY DATA SHEET (SDS)
  • Update Date: 2024-11-20 17:10:30
Whiskey lactone Structural

What is Whiskey lactone?

Description

All four stereoisomers of whiskey lactone, or β-methyl-γ-octalactone, are found in nature—specifically, in oak wood used to make barrels for aging whiskeys, wines, and brandies. The (+)-trans?isomer is shown. Recently, whiskey lactone was?identified as the source of coconut-like odors?in grape-based brandies such as Cognac and Armagnac.

Chemical properties

Whiskey Lactone is found as its cis- and trans-isomers in whiskey and in oakwood volatiles; the cis-isomer is the more important in sensory terms. It is a clear, almost colorless liquid with an intense, warm, sweet, coumarin-like odor.
A cis–trans mixture can be prepared by radical addition reaction of pentanal with crotonic acid followed by reductive cyclization of the resulting ??-oxo acid with sodium boron hydride/sulfuric acid . It is used in aroma compositions, for example, for beverages.

Occurrence

Reported present in cognac, rum, Irish malt, bourbon whiskey, scotch, sherry, port and wine.

Definition

ChEBI: Quercuslactone a is a gamma-lactone.

Aroma threshold values

80% of a taste panel found whiskey lactone intolerable at 160 ppm

Taste threshold values

Taste characteristics at 0.5 ppm: woody, coumarinic, coconut, lactonic, creamy and nutty with a toasted nuance.

Synthesis Reference(s)

Tetrahedron Letters, 26, p. 6225, 1985 DOI: 10.1016/S0040-4039(00)95058-5

Trade name

Methyl octalactoneTM (PFW)

Properties of Whiskey lactone

Boiling point: 93-94 °C5 mm Hg(lit.)
Density  0.952 g/mL at 25 °C(lit.)
refractive index  n20/D 1.4454(lit.)
FEMA  3803 | 4-HYDROXY-3-METHYLOCTANOIC ACID LACTONE
Flash point: >230 °F
form  clear liquid
color  Colorless to Almost colorless
Odor at 10.00 % in dipropylene glycol. tonka coumarin coconut toasted nutty celery burnt
JECFA Number 437
CAS DataBase Reference 39212-23-2(CAS DataBase Reference)
NIST Chemistry Reference 2(3H)-furanone, 5-butyldihydro-4-methyl-(39212-23-2)
EPA Substance Registry System 2(3H)-Furanone, 5-butyldihydro-4-methyl- (39212-23-2)

Safety information for Whiskey lactone

Signal word Warning
Pictogram(s)
ghs
Exclamation Mark
Irritant
GHS07
GHS Hazard Statements H315:Skin corrosion/irritation
H319:Serious eye damage/eye irritation
H335:Specific target organ toxicity, single exposure;Respiratory tract irritation
Precautionary Statement Codes P261:Avoid breathing dust/fume/gas/mist/vapours/spray.
P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

Computed Descriptors for Whiskey lactone

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