Noun
a poisonous salt (KCN) used in electroplating and in photography
Source: WordNetHe also left Rynn with a jar of powder, telling her that it was a sedative (while it is actually potassium cyanide ) to give to her mother if she ever came for her. Source: Internet
Rynn places a dose of the potassium cyanide into her own cup and then takes the tea and almond cookies to the living room. Source: Internet
It does however, react with sodium or potassium cyanide under alkaline conditions when oxygen is present to form soluble complexes. Source: Internet
Reaction with potassium cyanide gives the 9-cyano-9,10-dehydro derivative. Source: Internet