300 µg per capsule

Kerosine, like petroleum or geranium”

Certified 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.

Flavour cards

Flavour standard information

Technical specification

Te best way to evaluate the kerosine-like flavour note associated with 1,3-pentadiene is as follows. 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 per capsule
The flavour threshold of 1,3-pentadiene in soft drinks is 100 µg / l.
1,3-Pentadiene is produced by contaminant microorganisms. Moulds such as Penicillium and Trichoderma, and yeasts such as Zygosaccharmoyces and Debaromyces convert odourless sorbic acid used as a preservatives in some soft drinks and fruit juices into the highly odour active molecule 1,3-pentadiene.
1,3-Pentadiene 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. during spoilage of soft drinks and fruit juices, or the ingredients from which they are made, by moulds.
CAS registry number
The CAS registry number for 1,3-pentadiene is 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
Formation of 1,3-pentadiene in soft drinks containing preservatives is somewhat ironic, since the very organisms that the sorbate preservatives are intended to inhibit are responsible for the formation of this potent and undesirable flavour compound.
Threshold distribution
Capsules per pot
Legal notices
This product is protected by the following trade marks and patents:
  • US Patent no. D679900
  • European Community Trade Mark
    Registration no. 009937574
  • European Community Trade Mark
    Registration no. 009856527
  • US Trade Mark Registration no. 4345057
  • US Trade Mark Registration no. 4345056
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