I have a specialization in Chemistry in my high school and we worked with Iodine and Bromide. IIRC Iodine is weak enough to be use as a desinfectant.

We used Bromide only oncde, probably disolved in carbon tetrachloride. A drop fell on my skin and it started to inch/hurt inmediately. I washed it imediately. It was not bad, just a whiter spot in the skin and some inching for a few days.

I'm more afraid of Bromide than Iodine.