dimethyl trisulphide

130 ng per capsule

Onion, like fried onion or garlic”

Certified beer flavour standard used to train professional beer tasters to recognize and scale the intensity of onion character. Dimethyl trisulphide is a desirable hop-derived character of some ales and and off-flavour formed during ageing of lager beers.

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 onion character arising from dimethyl trisulphide is as follows. Cover the beer 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
130 ng per capsule
The flavour threshold of dimethyl trisulphide in beer is 40 ng / l.
Although produced from amino acids during wort boiling most dimethyl trisulphide is formed during storage of packaged beer. Some hops impart this character when used post-fermentation.

Professional beer tasters can confuse dimethyl trisulphide with the following flavour compounds:

  • Methanethiol
  • Ethanethiol
  • Dimethyl sulphide
Onion flavour from dimethyl trisulphide is a desirable hop-derived flavour note in some ales. As an off-flavour it is formed during ageing in package of pale lager beers. It can also be found in fresh lager beer as a result of wort boiling practices (specifically, lack of boil vigour in all-malt worts).
CAS registry number
The CAS registry number of dimethyl trisulphide is 3658-80-8.
Other names
  • DMTS
  • 1,3-dimethyl trisulfane
  • methyl trisulfide
  • methyl trithiomethane
  • methylsulfanyldisulfanylmethane
  • methyltrithiomethane
  • 2,3,4-trithiapentane
  • methylsulfanyldisulfanylmethane
Dimethyl trisulphide is recognized as an important contributor to the aged character of pale lager beers.
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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dimethyl trisulphide beer flavoour standard - onion
earn 10 points

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