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.

Cyanogen Chloride (CK) 1916

Cyanogen chlorine was synthesized for the first time in 1802 by the French chemist Claude Louis Berthollet, although the correct chemical format was established by his compatriot Louis-Joseph Gay-Lussac in 1815. Cyanides have been used for their toxic potential since ancient Roman times.

Sulphur Mustard (HD) 1886

In 1886, German chemist Victor Meyer made the first reliable synthesis of pure Sulphur Mustard. The purity of this compound was high and consequently the adverse health effects upon exposure were also severe. Meyer tested this compound on laboratory rabbits, most of which died.

Phosgene (CG) 1812

Choking chemical agents are the oldest warfare agents. This type of agents was used for the first time in Peloponnese war in 428 and 424 B.C. The English scientist J.H Davy discovered already in 1812 phosgene, when exposing a mixture of carbon oxide and chlorine to the sunlight.

Hydrogen Cyanide 1782

The production of hydrogen cyanide (hydrocyanic acid) out of the sulfuric acid and Berlin-blue was discovered by Swedish chemist Carl Wilhelm Scheele in 1782. French chemist and physicist Joseph Louis Gay-Lussac prepared pure liquefied hydrogen cyanide in 1811.