300 µg per capsule

Diacetyl, like butter, or butter popcorn”

Certified soft drinks flavour standard used to train professional tasters to recognize and scale the intensity of diacetyl character. Butanedione is produced by contaminant lactic acid bacteria during production of soft drinks. The compound can sometimes result from the activities of yeasts. Butanedione imparts a sweet, butter-like note to soft drinks and at higher levels will be perceived as an off-flavour.

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

Flavour cards

Flavour standard information

Technical specification

The best way to detect diacetyl flavour in soft drinks is as follows. Without covering the glass, swirl the sample to release the aroma. Take a single short sniff. Repeat as necessary.
Amount of flavour per capsule
300 µg per capsule
The flavour threshold of diacetyl in soft drinks is 100 µg / l.
Diacetyl (2,3-butanedione) is produced by contaminant lactic acid bacteria (Lactobacillus, Pediococcus, Leuconostoc). Some yeasts produce a precursor of this compound which can give rise to 2,3-butanedione formation during product storage.
Diacetyl Imparts a sweet, butter-like note. Its presence can be indicative of microbiological spoilage of soft drinks by lactic acid bacteria or by alcoholic yeasts.
CAS registry number
The CAS registry number for 2,3,-butanedione is 431-03-8.
Other names
  • diacetyl
  • biacetyl
  • 2,3-butane dione
  • butane-2,3-dione
  • 2,3-diketobutane
  • dimethyl diketone
  • dimethyl glyoxal
  • 2,3-dioxobutane
Diacetyl is associated with formation of lactic and acetic acids when produced by contaminant lactic acid bacteria, and acetaldehyde when formed by contaminant alcoholic yeasts.
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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