Come on! Don't you think that you would have a "special attitude" too if someone told you that you don't know anything about hydrogenation? By the way, I didn't really expect anyone to know exactly what impurities deactivate the catalyst. I mainly wanted to know if anyone had successfully hydrogenated perfectly cleaned store bought pills before. When I UTFSE, I found people who said that it wouldn't work, but they didn't say whether they had tried it themselves, or whether it was just speculation. If you actually know the answer to my question like you say you do, then post it for everyone's benefit. Otherwise, don't go around insulting people for no reason at all. I'm glad you're post wasn't deleted as well because it makes you look like a jackass.