One eyed purple people-eater
P Patch Well-known Member Aug 8, 2021 #4,835 Possibly potassium permanganate purple?? (You have to be familiar with chemicals used in water treatment to know about KMNO4... potassium permanganate. But... it's purple!!! )
Possibly potassium permanganate purple?? (You have to be familiar with chemicals used in water treatment to know about KMNO4... potassium permanganate. But... it's purple!!! )