Radiation Hazard Symbol - Meaning, History, and Safety Use #3073804 (License: Personal Use)

This image shows the standard ISO 361 radiation hazard symbol, featuring a magenta or purple central circle, three bold yellow blades (trefoil), and alternating black and gray concentric rings. The design was created in 1946 at the University of California, Berkeley, and standardized internationally to ensure immediate visual recognition across language barriers. It is used on containers, equipment, facilities, and signage where radioactive materials or ionizing radiation sources are present.

Commonly used in nuclear facilities, medical imaging departments, laboratories, transport packaging, and emergency response materials. Matches user intent for safety education, regulatory compliance, scientific literacy, or hazard identification training.