Where It Comes From
Made by reacting iron with carbon monoxide; used in carbonyl iron powder production, metal finishing, and as a lab reagent [1][2].
How You Are Exposed
Mainly by breathing vapors at work; it can also be absorbed through the skin. Nearby residents may be exposed during spills or fires. Not common in consumer products [1][2].
Why It Matters
Even brief exposure can cause headache, dizziness, nausea, cough, chest tightness, and delayed fluid in the lungs (pulmonary edema); severe cases can be life‑threatening. Forms explosive mixtures with air [1][2].
Who Is at Risk
Workers in carbonyl iron manufacturing, metal finishing, chemical labs, maintenance/cleanup, and emergency responders near releases [1][2].
How to Lower Your Exposure
Use closed systems and local exhaust; monitor air (including CO); wear appropriate gloves and respirators; follow spill/fire evacuation guidance. Residents near facilities should follow alerts and shelter or evacuate as directed during releases [1][2].