THE BEST SIDE OF HOW MUCH IS CYANIDE

Potassium cyanide (KCN) was a significant source of alkali metal cyanides prior to the invention on the Castner process. It was produced by the decomposition of potassium ferrocyanide. The reaction is as follows:KCN is used as a photographic fixer within the wet plate collodion procedure.The KCN dissolves silver where it hasn't been made insolub