Biohazard Symbol - Universal Warning Sign for Biological Hazards #29543 (License: Personal Use)

This high-contrast symbol features three interlocking arcs radiating from a central circle, forming a trefoil shape in black against a vivid yellow background. Designed in 1966 by Charles Baldwin at Dow Chemical, it was created to be unmistakable and culturally neutral. It is mandated by OSHA and WHO for labeling biological hazards including pathogens, medical waste, and contaminated equipment.

Used on lab doors, sharps containers, biosafety cabinets, and transport packaging for infectious substances; matches user intent for safety compliance, hazard identification, or educational content about biosafety standards.