“Phenolic-4-EP, like blue cheese or band-aid”
Certified beer flavour standard used to train professional beer tasters to recognize and scale the intensity of phenolic character.
4-Ethyl phenol is produced by contaminant Brettanomyces yeasts and sometimes by lactic acid bacteria. This compound imparts an unpleasant ‘band-aid’ note to beer, occasionally described as ‘horse-like’ or ‘barnyard’. At low levels 4-ethyl phenol contributes to product complexity.
Food grade | Free from sensory impurities | Extensively tested | Safe to smell and taste.