EXAMINE THIS REPORT ON POTASSIUM CYANIDE DISSOLVED IN WATER

The caustic effects occur from currently being remarkably alkaline, but if potassium hydroxide is neutralised with a non-harmful acid then it gets a non-toxic potassium salt. It's accepted to be a food additive under the code E525.This really is made up of a reliable base (KOH) as well as a weak acid (HCN).  This is often used for your extraction