@Christian This is probably a reaction of hydrogen peroxide and luminol. I do it all the time, gives a beautiful blue glow. You can also replace the H2O2 with copper.
@Christian @masklayer Well I know its listed officially as toxic and that you are advised to wear goggles and gloves when using it. But i also know that they spray it on crime scenes without much concern for killing everyone in the room, so it cant be THAT toxic.
I'd says straight up drinking it though is like a 7 or 8 or something (number pulled out of my ass). Its toxic and drinking is a large quantity so at the very least will fuck you up somehow.