17 µg per capsule

Methional, like mashed potato or autolysed yeast”

Certified beer flavour standard used to train professional beer tasters to recognize and scale the intensity of methional character. Methional is an important ageing character in a range of beer styles, including lagers, ales and stouts. It is the signature flavour note in many low- and non-alcoholic 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 methional 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
17 µg per capsule
The flavour threshold of methional in beer is 5 µg / l.
Methional is produced in the brewhouse from the breakdown of the sulphur-containing amino acid methionine. It can also be released during beer ageing. In some breweries it can be associated with re-use of beer recovered from yeast and with over-pasteurization of beer.
  • Methanethiol
  • Dimethyl disulphide
  • Hydrogen sulphide
Methional is an important ageing character of lager, ales and stouts. It is a sulphury off-flavour of fresh lager beer. Methional is also a signature ‘worty’ note in many low- and non-alcoholic beers.
CAS registry number
The CAS registry number of methional is 3268-49-3.
Other names
  • beta-methiopropionaldehyde
  • beta-(methyl mercapto) propionaldehyde
  • methyl mercaptopropionaldehyde
  • 3-methyl mercaptopropionaldehyde
  • beta-methyl mercaptopropionaldehyde
  • methyl mercaptopropionic aldehyde
  • 3-methyl mercaptopropyl aldehyde
  • 3-(methyl thio) propanal
  • 3-(methyl thio) propionaldehyde
  • beta-(methyl thio) propionaldehyde
  • 3-methyl thiopropionaldehyde
  • beta-methyl thiopropionaldehyde
  • 3-methylsulfanylpropanal
The flavour impact of methional is influenced by both the alcohol and sulphur dioxide concentrations of the beer. Higher concentrations of both compounds suppress its flavour.
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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Methional beer flavour standard
earn 8 points

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