I have a store of dry chemical packs (small plastic press-lock-type bags. ) already weighed out to be mixed up as Pyrocat (done for me last year). I checked them today and found that the catechol seems to have "sweated" into a brown liquid - possibly through condensation forming, although I tried to prevent this by putting the bags inside other bags inside yet another bag then in a large tupperware type airproof box.
Can anyone tell me if the catechol would be ruined by this - it still smells very strong so hopefully not. I have a few years worth of dry developer mix stashed away in there