White globose hard mass, granular or crystalline powder, highly toxic. Deliquescence in moist air and the release of trace amounts of hydrogen cyanide gas. Soluble in water, slightly soluble in alcohol, aqueous solution is strongly alkaline, and quickly hydrolyzed. Density: 1.857g/cm^3, boiling point: 1497℃, melting point: 563℃. Death can result from exposure to skin wounds or inhalation of trace amounts of powder. In contact with an acid, a highly toxic hydrogen cyanide gas is released, which can explode when mixed with chlorate or sodium nitrite.
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