Radiation Hazard Symbol - Official Trefoil Warning Sign #3705702 (License: Personal Use)

This black-and-white trefoil symbol, consisting of three curved blades around a central circle, is the standard international sign for ionizing radiation hazards. Adopted by the IAEA and ISO, it conveys immediate risk of exposure to radioactive materials or equipment. Its high-contrast design ensures visibility and recognition across languages and contexts.

Used on containers, doors, equipment, and signage in nuclear facilities, medical imaging labs, research centers, and transport vehicles carrying radioactive substances. Matches user intent for safety education, regulatory compliance, or hazard identification.