Dangerous? Well, I would avoid skin contact like the bottle says and wash hands fully after use even if you don't suspect contact.
Gels and liquids can be used as well. I recommend one with a fungicide. Dip-N-Grow is a liquid with fungicide and the best rooting compound I've ever used, hands down. Happily, it is also the cheapest! Yay.
How long has your cutting been in perlite, and what else are you using to create an ideal environment for rooting? Dome? Tray? Moisture level? Light? Part of plant you are using? How large a cutting? Any anti-transpirant? etc...