Cohumulone levels?

[briewer2]

Hello all,
I have been hearing a lot about cohumulone contributing to harsh bitterness in beer. I want to buy some low-cohumulone hops for a IIPA I am doing, but cant seem to find a list of cohum levels in hops. Any suggestions?

 

[MattHollingsworth]

Hop oils and resins and info here:

http://www.probrewer.com/resources/hops/hop_data.php

 

[nealf]

Here ya go:

http://www.brew-monkey.com/brewschool/hopdata.php

 

[GilaMinumBeer]

http://www.freshops.com/hops/usda-named-hop-variety-descriptions#usda_id_TopOfPage

Another source for averages.

 

[briewer2]

thanks. So am I to understand 25% and under is considered low? Also, does it change in relation to AA%? Or is it a it reported as a percent of AA? IE. If two hops at 25% cohumulone have different alpha acids (say 5% and ten%), does that mean one ounce of each would have the same amount of cohumulone or does the 10% have twice as much as the 5%?

 

[noblesquirrel]

The percentage is relative to all of the AA in the hop. You can also see humulone, etc. in a lot of figures. A 10% hop with 25% cohumulone has twice as much as a 5% hop.

 

[MattHollingsworth]

The percentage is relative to all of the AA in the hop. You can also see humulone, etc. in a lot of figures. A 10% hop with 25% cohumulone has twice as much as a 5% hop.

This is true. But say you use a 5% AA hop and a 10% AA hop to bitter a beer and both have 25% cohumulone. You'd have to add twice as much of the 5% AA hop to achieve the same bittering. So it sorta negates that.

 

[Zookeeps]

Some of the links above are dead now. I found a great table here:
http://www.babblehomebrewers.com/attachments/article/68/hopusage.pdf