The second and slight metabolic pathway is made up of the reaction of cyanide with cystine to produce cysteine and ?-thiocyanoalanine (Wooden and Cooley 1955).Not locating what you're looking for?Conserve potassium cyanide powder to obtain e-mail alerts and updates on your eBay Feed.Potassium cyanide can be a chemical compound with the formula KCN.