1.9 µg per capsule

"Catty, like blackcurrant juice or tom cat urine"

Certified cider flavour standard used to train professional cider tasters to recognize and scale the intensity of catty character. Catty notes in cider can arise from the interaction of chemical contaminants, including paint-derived materials and solvents, with yeast metabolites. The sulphury note formed resembles tom cat urine.

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 catty flavour notes in cider 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
1.9 µg per capsule
The flavour threshold of menthane-8-thiol-3-one in cider is 1.9 µg / l.
Catty flavour arises due to contamination of juice with precursor materials. H2S produced during fermentation reacts with mesityl oxide to produce a catty note.
Various sulphur compounds Impart undesirable odours to cider, reminiscent of tom cat urine. Mesityl oxide contamination can arise from contact of raw materials with painted surfaces or plastic coatings. The presence of solvent materials such as acetone in the production environment can also be associated with such problems.
CAS registry number
The CAS registry number for 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 cider. The specific compound depends on the source. The compound used in this flavour standard is representative of the flavour of such compounds.
Threshold distribution
Capsules per pot
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