Sciencemadness Discussion Board

potassium ferrocyanide + citric acid = HCN?

orangesphere - 26-1-2004 at 12:40

Is it true that, under certain conditions, mixing potassium ferrocyanide with citric acid would produce HCN fumes? :o If so, what are these conditions that one should avoid? I don't plan on doing this myself; I am not a terrorist or suicidal :P , but am simply curious. :)

This is my first post on this forum, by the way. :)

Theoretic - 27-1-2004 at 05:23

On warming, almost any acid can produce HCN fumes from ferrocyanides. Citric acid will do it. Strong acids can probably do it without heating.

[Edited on 27-1-2004 by Theoretic]