I'm pretty confident my 'home chemistry set' included something by that name back in the late 80s. One of the experiments I remember is drinking some of it in order to render my pee blue.

have you acquired super powers, and or become an evil villain since?

Some people would probably claim the latter. The blue pee was temporary, and mildly disappointing from what I remember. But I'm assuming it's reasonably safe if it's included in chemistry sets...then again, mine also had mercury in it..

So the chemistry set encouraged consuming some of the chemicals and also contained mercury? How times have changed...

Methylene blue is an FDA approved drug, it is injected I understand.