I was synthesising a pesticide in laboratory during my masters, where I had to use Liquid bromine. It was very dangerous coz even a single drop of bromine can bring out ur flesh if it gets touched on ur skin. was very scary and difficult one!
Most of the experiments I run are very safe because we take precautions to minimise the risks involved. I used to use piranha solution to clean electrodes though, and this is very dangerous because it eats anything! Hence its name.
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