Potassium cyanide (KCN) was a very important source of alkali metal cyanides prior to the invention on the Castner course of action. It was made by the decomposition of potassium ferrocyanide. The response is as follows: We currently cannot ship this solution to physician places of work, pharmacies, medical facilities, https://potassiumcyanideformula43188.amoblog.com/not-known-factual-statements-about-potassium-cyanide-effects-on-human-health-52269727