It is here.
Lol he's sometimes even enquired if a stain on a metal countertop is safe to wipe away (that is using paper roll, just in case, I imagine, something is extremely oxidizing but has accidentally had a few drops spilled. Because there are things that would quite easily make for example, paper, sugar, glycerine, alcohol or other things that could present themselves as fuel, burst into flame. Perchloric acid is likely the worst, as it likes to soak into for example wooden lab furniture, tables etc. and form very shock-and-friction sensitive primary explosives, cellulose perchlorates I think. And after a long time, its there lurking. When a source of ignition, heat, friction, or one puts down something heavily. BOOM!
Have had to tell him not to enter certain rooms at times because whilst I was wearing a gas mask, and covered in heavy butyl rubber gloves, goggles, covered in an old, very thick leather trench I use for a labcoat because it will resist many corrosives for long enough to shed the thing and douse it in whatever it takes to quench the same.
You seem to be lost in your own thoughts.