260 ng per capsule

Earthy, mouldy, like peat or compost”

Certified beer flavour standard used to train professional beer tasters to recognize and scale the intensity of earthy character. 2-Methylisoborneol is imparted to beer via tainted water. It gives affected beers an earthy, somewhat mouldy character reminiscent of peat or rotting compost.

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

Flavour cards

Flavour standard information

Technical specification

The best way to evaluate 2-methylisoborneol 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
260 ng per capsule
The flavour threshold of 2-methylisoborneol in beer is 85 ng / l.
Mouldy flavours from 2-methylisoborneol are imparted to beer through use of contaminated brewing liquor, rinse liquor or dilution liquor. The source of such taints is growth of microorganisms in the water supply.
  • Geosmin
  • Ethyl fenchol
  • 2-Isopropyl-3-methoxypyrazine
2-Methylisoborneol imparts a mouldy, earthy taint to beer. It is associated with a moderate degree of consumer rejection. Beers tainted with 2-methylisoborneol are described by consumers as ‘dirty’ or ‘contaminated’.
CAS registry number
The CAS registry number for 2-methylisoborneol is 2371-42-8.
Other names
  • 1,6,7,7-tetramethylbicyclo[2.2.1]heptan-6-ol
  • MIB
  • exo-1,2,7,7- tetramethyl bicyclo(2.2.1)heptan-2-ol
Taints caused by 2-methylisoborneol are usually associated with problems related to abstraction of surface waters. Water treatment practices should remove the methylisoborneol 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
Free Shipping
Methylisoborneol beer flavour standard
earn 8 points

You may also be interested in