I actually worked on chemical etching on stainless steel and as I make photolithography, I have to use a new photoresist which contain the Photosensitizer named in the question. That's why I wanted to know exactly what is the reaction between an UV light (approximatively 400nm) on this sensitizer (if it has thermal effect, and what is the chemistry behind). The number CAS of the sensitizer is 71868-10-5.