Biohazard Symbol - Universal Warning Sign for Biological Hazards #131585 (License: Personal Use)

The biohazard symbol features a black trefoil (three-leaf) design centered on a bright yellow circle with a bold black outer ring, ensuring high visibility and immediate recognition. Developed in 1966 by Charles Baldwin, it is standardized under ISO 3864-3 and used worldwide to mark biological hazards including pathogens, toxins, and contaminated materials. Its design avoids cultural or linguistic bias, making it universally understandable in scientific, medical, and industrial settings.

Commonly displayed on lab doors, sharps containers, biosafety cabinets, and hazardous waste labels; used when users seek safety information, regulatory compliance guidance, or hazard identification resources.