It is a strong biocidal whose essential active ingredient is a chlorine-compound. As everyone knows from the swimming pool, it smells at a reaction of the chlorine for this (if a reaction takes place). So also here. The smell dissipates, however after a few hours and in my opinion, in relation to the mold spores harmless.
To apply personally I would however still wear protective clothing. In particular, the eyes and respiratory system should be protected. Individual droplets on the skin could easily be rinsed off. However, one should perhaps wear old clothes to avoid fading.