Offer potassium cyanide. An extremely poisonous white compound, kcn, used in the extraction of gold and silver from ores, in electroplating, andin photography, and as a fumigant and insecticide. (inorganic chemistry) the potassium salt ofhydrocyanic acid, kcn; thecolourless crystals are solublein water, and it is extreme lypoisonous, and is used inelectroplating, the extraction of gold and silver from their ores,and in photography.

Offer potassium cyanide. An extremely poisonous white compound, kcn, used in the extraction of gold and silver from ores, in electroplating, andin photography, and as a fumigant and insecticide. (inorganic chemistry) the potassium salt ofhydrocyanic acid, kcn; thecolourless crystals are solublein water, and it is extreme lypoisonous, and is used inelectroplating, the extraction of gold and silver from their ores,and in photography.