This is a picture of some Martius yellow that was recrystallized from acetone (this is the stuff that I rinsed off of my glassware). I hadn't expected it to form such nice crystals. I think I will recrystallize all of it since it does. UPDATE: This is not Martius yellow. Acetone apparently reacts with Martius yellow, … Continue reading Martius Yellow Recrystallized