Biohazard Symbol | Universal Warning Sign for Biological Hazards #131615 (License: Personal Use)

This high-contrast black-and-white symbol consists of three interlocking circles surrounding a central dot, forming a trefoil shape. Created in 1966 by Charles Baldwin at Dow Chemical, it was engineered for maximum visibility and universality, regardless of language or literacy. It is mandated by OSHA and WHO for labeling containers, equipment, and areas containing pathogens, toxins, or medical waste.

Used on laboratory doors, sharps containers, biosafety cabinets, and medical waste bags; this image serves informational, educational, and compliance purposes-targeting scientists, safety officers, students, and emergency responders seeking hazard identification guidance.