1. a colorless, toxic gas (COCl₂) used in chemical manufacturing and historically as a chemical weapon.
Usage: chemistry term; hazardous substance

Examples

• Phosgene was used as a chemical weapon during World War I.
• The chemical plant handles phosgene in sealed containers to prevent exposure.
• Phosgene is produced industrially for the synthesis of polyurethanes and polycarbonates.
• Inhalation of phosgene can cause severe respiratory damage.
• Safety protocols require immediate evacuation if phosgene is detected in the air.