1.9 µg per capsule

"Catty, like blackcurrant juice or tom cat urine"

Certified Beer flavour standard used to train professional beer tasters to recognize and scale the intensity of catty character. Catty notes in beer can arise in several ways. They can occur as a positive note via hops; an off-flavour associated with beer ageing; and a taint derived from the interaction of a chemical contaminant with a yeast metabolite.

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

Flavour cards

Flavour standard information

Technical specification

The best way to asess catty flavour notes 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
1.9 µg per capsule
The flavour threshold of p-menthane-8-thiol-3-one in beer is 1.9 µg / l.
As a taint, catty flavour arises due to contamination of malt with mesityl oxide. As an off-flavour, it is formed during beer ageing in pack. It can also arise through use of specific hop varieties.
  • Ethyl butyrate
  • Ethanethiol
  • Methanethiol
Catty notes can be positive flavour characters imparted to beer by the use of specific hop varieties. They can also be taints or off-flavours.
CAS registry number
The CAS registry number for p-menthane-8-thiol-3-one is 38462-22-5.
Other names
  • para-mentha-8-thiol-3-one
  • buchu mercaptan
  • mangone
  • buchu ketone
  • 2-(1-mercapto-1-methyl ethyl)-5-methyl cyclohexan-1-one
  • 8-mercapto-para-menthan-3-one
  • 8- mercapto-para-menthane-3-one
  • mercaptoisopropyl-5-methyl cyclohexanone
  • 5-methyl-2-(2-sulfanylpropan-2-yl)cyclohexan-1-one
  • pulegone mercaptan
  • ribes mercaptan
  • thiomenthone
A range of compounds impart catty characters to beer. The specific compound depends on the source of the flavour. The compound used in this flavour standard - p-menthane-8-thiol-3-one - is representative of the flavour of such compounds.
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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Catty beer flavour standard
earn 9 points

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