Radioactive Warning Symbol - Official Trefoil Sign for Radiation Hazards #1207588 (License: Personal Use)

This image displays the internationally standardized radiation warning symbol, known as the trefoil, consisting of three black blades arranged at 120-degree angles around a central circle, all set against a bright yellow background with a thick black outer ring. Adopted by the IAEA and ISO, it signifies the presence of ionizing radiation and is mandated on containers, labs, reactors, and transport vehicles. Its high-contrast design ensures immediate recognition and compliance with safety protocols worldwide.

Used on signage, packaging, and safety documentation in nuclear facilities, medical radiology departments, research labs, and hazardous material transport; matches user intent for safety education, regulatory compliance, or hazard identification resources.