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.

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.