ethyl fenchol

175 µg per capsule

Earthy, like damp or freshly-dug soil”

Certified beer flavour standard used to train professional beer tasters to recognize and scale the intensity of earthy character. Ethyl fenchol is one of several compounds that impart an earthy off-flavour to beer.

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 earthy flavours in beer caused by ethyl fenchol 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
175 µg per capsule
The flavour threshold of ethyl fenchol in beer is 30 µg / l.
Earthy taints from ethyl fenchol are imparted through use of contaminated brewing liquor, rinse liquor or dilution liquor. The flavour arises from growth of microorganisms in the water supply.

Professional beer tasters can confuse the odour and taste of ethyl fenchol with the following flavour compounds

  • Geosmin
  • 2-Methylisoborneol
  • 2-Isopropyl-3-methoxypyrazine
Ethyl fenchol is a taint in beer. It is associated with a moderate degree of consumer rejection. Earthy taints from ethyl fenchol are sometimes described by consumers as ‘dirty’ or ‘contaminated’.
CAS registry number
The CAS registry number of ethyl fenchol is 18368-91-7.
Other names
  • 2-ethyl fenchol
  • 2-ethyl-1,3,3-trimethyl bicyclo(2.2.1)heptan-2-ol
  • 2-ethyl-1,3,3-trimethyl-2-norbornanol
  • 2-ethyl-1,3,3-trimethyl-2,2-norbornanol
  • 6-ethyl-1,5,5-trimethylbicyclo[2.2.1]heptan-6-ol
Problems with ethyl fenchol are usually associated with abstraction of surface waters. Water treatment practices should remove any ethyl fenchol present prior to use.
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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ethyl fenchol beer flavour standard - earthy
earn 8 points