Nitrogen Mustard (HNs) 1930’s

Nitrogen mustards were first synthesised in the 1930s as potential chemical warfare weapons, to have greater systemic toxicity than sulphur mustard. American and German defence organisations started military production in 1941 and 1943.

Lewisite (L) 1917

Julius Arhur Nieuwland, a Belgian-born Holy Cross priest and professor of chemistry and botany, made the first known synthesis of acetylene and arsenic trichloride in 1904, during his PhD studies, while conducting a research on acetylene, looking for a solution to synthetic rubber.