The caustic effects crop up from becoming extremely alkaline, however, if potassium hydroxide is neutralised that has a non-harmful acid then it gets a non-poisonous potassium salt. It's accredited for a foodstuff additive beneath the code E525. The "pregnant liquor" made up of these ions is separated through the solids, https://elliotrnkfb.vidublog.com/29682689/5-easy-facts-about-potassium-cyanide-price-per-kg-described