(source: https://www.rsc.org/periodic-table/element/33/arsenic)

Elemental arsenic is a well-known poison. Surprisingly, arsenic can also have medicinal applications. In Victorian times, Dr Fowler’s Solution (potassium arsenite dissolved in water) was a popular cure-all tonic that was even used by Charles Dickens. Fowler’s solution itself was a substitute for another “patent medicine”

Today there is renewed interest in inorganic arsenic compounds as pharmaceuticals: Pharmaceutical Compositions Comprising Sodium Or Potassium Arsenite For The Treatment Of Urogenital Cancer And Its Metastasis (2006). Furthermore, organoarsenic compounds can also be used in medicine:

An example of a simple organoarsenic compound is the 5 membered heterocycle arsole. Arsenic compounds can be used to make special glass (Arsenic Sulphide Glasses (1962)), and preserve wood (Improvements Relating To The Impregnation Of Wood With Arsenic Preparations (1952)).


All patent information has been obtained from Espacenet (European Patent Office).