What exactly is sulfer hexflouride and is it dangerous to inhale?

I know that its a gas and taht it does the opposite effect of helium bringing your voice down lower. I also know that there is a neat trick that you can do with using an aluminum foil boat and having the gas pumping into a tank . Is it dangerous in anyway as it has the name sulfur attached to it and i know that certian forms of sulfer are dangerous and if it is not is there anyway i could get some ( i would only use it in a safe envoirnment and wouldnt use it in any harmful way and if im not allowed to have it then its okay)