As someone who majored in biochemistry, I just want to say that Mirae literally broke too many safety rules for me to actually believe that she wants to be a chemist. I mean safety is one of the very first lessons we get, before we go into lab and during lab. It's always emphasized and pointed out, first aid kits locations are pointed out, emergency procedures are gone over. Especially right before an experiment that involves hazardous chemicals.
Luckily they were only making aspirin, from what I could see.