2-methylisoborneol

260 ng

“Earthy, mouldy, like peat or compost”

Water flavour standard used to train professional tasters to recognize and scale the intensity of earthy character. 2-Methylisoborneol is formed by Cyanobacteria, Actinobacteria and algae in lakes, reservoirs and water distribution systems. It has a very low odour threshold and is one of the most common flavour faults in potable water. The compound imparts an unpleasant earthy note, reminiscent of peat or compost.

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

  • Label image
  • Chemical structure

Flavour cards

Flavour standard information

Technical specification

Assessment
Without covering the glass, swirl the sample to release the aroma. Take a single short sniff. Repeat as necessary.
Amount of flavour per capsule
260 ng
Threshold
85 ng / l in water
Origins
Formed by Actinobacteria, Cyanobacteria and algae in lakes, reservoirs and water distribution systems. Produced both by actively-growing organisms and through cell lysis and decomposition.
Importance
Imparts an unpleasant earthy odour to water which is reminiscent of peat or rotting compost. Extremely odour-active and for that reason one of the most common flavour faults in potable water.
CAS registry number
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
Remarks
Most common in surface abstracted waters. Formation can be influenced by weather conditions leading to concentration of organic materials in the water and growth of microorganisms.
Threshold distribution
Graph
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