Radioactive Warning Symbol - International Ionizing Radiation Hazard Sign #75995 (License: Personal Use)

This image shows the standard ISO 361 radiation warning symbol: a bright yellow circle with three black equidistant blades (trefoil) radiating from a central black circle, set against a black background for maximum contrast. Designed in 1946 at the University of California, Berkeley, it conveys the presence of potentially hazardous ionizing radiation and is mandated by regulatory bodies worldwide. Its high-visibility design ensures immediate recognition in labs, nuclear facilities, medical imaging centers, and transport packaging.

Used on signage, equipment labels, containers, and safety documentation to alert personnel and the public to radiation hazards; matches user intent for educational, safety compliance, or regulatory reference content.