Malononitrile

Made in chemical plants; used as an intermediate for pharmaceuticals, dyes, agrochemicals, and resins; found in research labs [2].

Breathing vapors or mists where it’s made or used, skin/eye contact with liquid, or being near a spill or fire that can release hydrogen cyanide gas; contaminated water is possible after incidents [1][2].

Short, high exposures can cause headache, dizziness, nausea, confusion, breathing trouble, seizures, cardiac arrest, and death; it can irritate eyes/skin [1][2][3].

Workers in chemical manufacturing or labs; emergency responders to fires/spills; people with heart/lung disease, pregnant people, and children may be more vulnerable [1][3].

At work, use closed systems/ventilation and appropriate gloves, eye, and respiratory protection; follow spill/fire procedures. In the community, follow official guidance, avoid affected areas/water until cleared, and store/dispose chemicals properly [1][2].