Hydrogen cyanide

Hydrogen cyanide, also known as HCN and prussic acid, was a chemical compound.
On the Sense Sphere, the First Doctor used a syringe of prussic acid to kill a Zilgan. (PROSE: )
Mehendri Solon kept Morbius' brain alive using hydrogen cyanide as a colloidal nutrient. The Fourth Doctor used hydrogen cyanide to create cyanide gas in an attempt to kill Solon and Morbius. (TV: )
Catherine's cat was poisoned by accidental exposure to prussic acid. (PROSE: )
Hydrogen cyanide composed 9% of the 456 atmosphere. (TV: )
Zyklon B was a form of hydrogen cyanide. (AUDIO: )
Category:Compounds