2-isobutyl-3-methoxypyrazine

60 ng

“Earthy, like green pepper”

Beer flavour standard used to train professional beer tasters to recognize and scale the intensity of earthy character. 2-Isobutyl-3-methoxypyrazine contaminates beer via tainted water. This compound has an odour which is reminiscent of green peppers or green beans.

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 beer to release the aroma. Take a single short sniff. Repeat as necessary.
Amount of flavour per capsule
60 ng
Threshold
20 ng / l in beer
Origins
Imparted through use of contaminated brewing liquor, rinse liquor or dilution liquor. Source of the taint is growth of microorganisms in the water supply.
Confusions
  • Not yet known
Importance
Taint in beer. Associated with a high degree of consumer rejection. Often described by consumers as ‘chemical’ ’ or ‘contaminated’.
CAS registry number
24683-00-9
Other names
  • 2-methoxy-3-(2-methylpropyl)pyrazine
  • isobutyl methoxypyrazine
  • 3-isobutyl-2-methoxypyrazine
  • galbanum pyrazine
  • 2- methoxy-3-(2-methyl propyl) pyrazine
  • 2-methoxy-3-(2-methylpropyl)pyrazine
  • 2-methoxy-3-isobutyl pyrazine
  • 2-2-methyl propyl-3-methoxypyrazine
Remarks
Methoxypyrazine taints can be caused by several compounds, of which 2-isobutyl-3-methoxypyrazine is only one. Water treatment practices should remove the methoxypyrazine prior to use.
Threshold distribution
Graph
Free Shipping
isobutyl methoxypyrazine beer flavour standard - earthy
earn 8 points
£79.00
OR

Related flavours

You may also be interested in

Last viewed

  1. Product image

    2-bromophenol
    £69.00
    “Bromophenol, inky, like a museum or old TV set”
  2. Product image

    2-acetyl pyridine
    £79.00
    “Malty-biscuity, like pale barley malt or malt dust”
  3. Product image

    2,6-dichlorophenol
    £69.00
    “Chlorophenol, like antiseptic mouthwash”