Description KCN and NaCN are white crystalline solids with a faint almond odor. Sodium cyanide also has a slight odor of hydrocyanic acid when damp. KCN: Boilingpoint=1625℃; Freezing/Melting point=634℃. NaCN:Boiling point=1496℃; Freezing/Melting point=564℃.NFPA 704 M Hazard Identification (KCN and NaCN):Health 3, Flammability 0 [(4) gas], Reactivity 1 [(2) gas].Soluble in water.
