Potassium cyanide (KCN) was an essential supply of alkali steel cyanides ahead of the invention of the Castner approach. It had been made by the decomposition of potassium ferrocyanide. The reaction is as follows: As a result of cyanide anion's higher nucleophilicity, cyano groups are conveniently introduced into organic molecules https://ispotassiumcyanidelegal69146.blogmazing.com/29818842/not-known-details-about-is-potassium-cyanide-dangerous