dimethyl disulphide

230 µg per capsule

Rotten vegetable, like a sewage treatment plant”

Certified beer flavour standard used to train professional beer tasters to recognize and scale the intensity of rotten vegetable character. Dimethyl disulphide is an off-flavour formed in beer as a result of hydrogen sulphide production by yeast and its subsequent reaction with beer components.

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

Flavour cards

Flavour standard information

Technical specification

Assessment
The best way to evaluate rotten vegetable, sulphury character in beer is as follows. Without covering the glass, swirl the beer to release the aroma. Take a single short sniff. Repeat as necessary.
Amount of flavour per capsule
230 µg per capsule
Threshold
The flavour threshold of dimethyl disulphide in beer is 75 µg / l.
Origins
Dimethyl disulphide is formed in beer as a result of production of hydrogen sulphide by yeast. If venting of the fermenter is poor (or the fermentation is done under pressure) flavours like this can build up.
Confusions

Professional beer tasters can confuse the odour of dimethyl disulphide with the following:

  • Dimethyl trisulphide
  • Methional
  • Hydrogen sulphide
Importance
Dimethyl disulphide (DMDS) is an off-flavour in fresh beer. It also develops in some beers during ageing in pack. It can also occasionally arise as a taint through use of contaminated carbon dioxide for carbonation of beer. Some describe this flavour as 'dirty sulphur'.
CAS registry number
The CAS registry number of dimethyl disulphide is 624-92-0.
Other names
  • DMDS
  • dimethyl disulfide
  • dimethyl disulfane
  • 2,3-dithiabutane
  • methyl disulfide
  • (methyl dithio) methane
  • methyl dithiomethane
  • methyldithiomethane
  • methyldisulfanylmethane
Remarks
Some systems for recovery of alcohol from yeast produce distillates containing this flavour. These distillates impart this flavour to the beers to which they are added.
Threshold distribution
Graph
Capsules per pot
10
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 disulphide beer flavour standard - rotten vegetable
earn 8 points
£79.00