Things I Won't Work With: Dioxygen Difluoride
Actually I worked as a synthetic organic chemist in a previous life and I was always much more afraid of the chronic systemic poisons than the things that blew up. It's one thing to have something go boom in your fume hood and quite another to get a drop of something on your glove that you don't even notice and then later that week all your hair starts falling out and everything tastes like metal. Organo-selenium, tin and tellurium compounds are particularly nasty.<p>I'm much happier now with nothing more serious than RSI to worry about.