Cyanide is a highly poisonous substance that has been used for centuries in various applications, including pest control, metal extraction, and electroplating. However, cyanide also has a dark history of being used as a lethal weapon, most notably during the Holocaust.
In dentistry, cyanide is used in very small amounts to whiten teeth. The cyanide compound, potassium cyanide, is mixed with a bleaching agent and applied to the teeth. The cyanide helps to break down the stains on the teeth, leaving them whiter.
