Biohazard Symbol - Official Warning Sign for Biological Hazards #2308919 (License: Personal Use)

This high-contrast black-and-white symbol consists of three interlocking circles with curved arms radiating from a central point, forming a trefoil shape. Created in 1966 by Charles Baldwin at Dow Chemical, it was intentionally designed to be memorable, non-cultural, and easily recognizable even when inverted or viewed from a distance. It is mandated by OSHA and used globally on containers, equipment, and facilities handling pathogens, medical waste, or recombinant DNA.

Used on lab doors, sharps containers, biosafety cabinets, and transport packaging to alert personnel and the public to biological hazards; matches user intent for safety compliance, educational resources, or hazard identification guides.