Discovered by Albertus Magnus in 1250, by heating soap together with Arsenic trisulfide.
Arsenic was used in various agricultural insecticides and poisons. Arsenic trioxide has been used in a variety of ways over the past 500 years, most commonly in the treatment of cancer, but in medications as diverse as Fowler’s solution in psoriasis.
Arsenic has been used as a component of World War I-era chemical weapons and in Agent Blue, a Vietnam Era herbicide. Arsenic has been in use since ancient times, specifically by Greek, Egyptian, and Chinese civilizations.
Arsenic is metalloid
