1,3-pentadiene

300 µg

“Kerosine, like petroleum or geranium”

Soft drinks flavour standard used to train professional tasters to recognize and scale the intensity of kerosine character. Pentadiene is produced by contaminant yeasts and moulds from the preservative sorbic acid. Sorbates are sometimes added to soft drinks to protect against microbiological spoilage. Pentadiene imparts a flavour note to affected products which is typically described as kerosine-like with additional descriptors of plastic, paint and geranium depending on the concentration.

Food grade | free from sensory impurities | extensively tested | safe to smell and taste.

  • Label image
  • Chemical structure

Flavour cards

Flavour standard information

Technical specification

Assessment
Cover the sample with your hand and swirl the glass to release the aroma. Remove your hand and take a single long sniff. Repeat as necessary.
Amount of flavour per capsule
300 µg
Threshold
100 µg / l in soft drinks
Origins
1,3-Pentadiene is produced by contaminant microorganisms. Moulds such as Penicillium and Trichoderma, and yeasts such as Zygosaccharmoyces and Debaromyces convert sorbic acid to 1,3-pentadiene.
Importance
This compound imparts a potent ‘chemical’ taint to affected products. It is typically described as kerosene-like, with additional descriptors of plastic, paint, and geranium depending on the nature of the affected product. Styrene may also be formed together with 2,3-pentadiene by some organisms.
CAS registry number
504-60-9
Other names
  • 1-methylbutadiene
  • 1,3-PD
  • (Z)-1,3-pentadiene
  • cis-piperylene
  • cis-1-methylbutadiene
  • cis-1,3-pentadiene
  • 1,cis-3-pentadiene
  • (3Z)-1,3-pentadiene
  • pentadiene-1,3,cis
  • (Z)-penta-1,3-diene
Remarks
Formation of this flavour note is somewhat ironic, since the very organisms that the sorbate preservatives are intended to inhibit are responsible for its formation.
Threshold distribution
Graph
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