Radioactive Warning Symbol - Universal Hazard Sign for Ionizing Radiation #115655 (License: Personal Use)

This image shows the standard ISO 361 radiation warning symbol: a bright yellow circle with a black trefoil (three-bladed propeller) and central dot, designed for high visibility and instant recognition. It signifies the presence of ionizing radiation that may pose health risks, and is mandated on containers, equipment, and facilities handling radioactive substances. The design was created in 1946 at the University of California, Berkeley, and remains unchanged as a global safety standard.

Used on signage, packaging, lab equipment, and nuclear facility entrances to alert personnel and the public to radiation hazards; matches user intent for safety education, regulatory compliance, or hazard identification resources.