Safety Statements: A poison by intratracheal route. Moderately toxic by intraperitoneal route. Mixture with blown castor oil + tukey red oil (sulfonated castor oil) may ignite spontaneously in air. Reaction with ethylene oxide forms a product which ignites spontaneously in air. May ignite spontaneously in storage with lead chromate. When heated to decomposition it emits toxic fumes of NOx and CN−. See also IRON COMPOUNDS.