Problem is that there are a lot of phenolic compounds and many occur in beer with fairly pleasant effects. Examples include the clove of weizen and the peat smoke flavors of some Scotch/Scottish ales.

But for me the word “phenol” means another specific flavor that is altogether different: it has a solventy, minerally trait (also bandaids, disinfectant) that can certainly be harsh when present in excess as it might be in a beer infected with wild yeast. But a touch of even this harsh form of phenol can be a pleasant thing in something like a Belgian strong ale.

That’s my take.

Cheers,

Ray

I think of bad phenols as a band-aid medicine smell, like my elementary school nurse’s office; a place I spent too much time in. That conjures up a variety of other smells too, like iodine and cotton balls, but I try to repress these. I remember her fondly, so those smells might not as unpleasant for me as other people.

Of course, I first came across the word after I brewed my first batch of beer with heavily chlorinated water, when trying to figure out why it tasted the way it did (in a bad way.)