Hidrojene sianide itagira amazi (aside ya prusike, HCN): umuti utemba utagira ibara kandi ni uburozi bwica. Hano ikorwa hakoreshejwe uburyo bwa Wöhler hifashishijwe potasiyumu feroziyanide na aside sulfurike yavanze n'amazi, igakamurirwa kuri kalisiyumu kolorire. Ikoreshwa mu gukora aseton siyanohidirine, intambwe ya mbere igana ku kirahure cya akirilike.