Biohazard Symbol | Meaning, Usage & Safety Signage #292931 (License: Personal Use)

This iconic trefoil symbol-comprising three interlocking circles with central arcs-was developed in 1966 by Charles Baldwin at Dow Chemical to denote biological hazards including viruses, bacteria, and medical waste. Its high-contrast black-on-white design ensures visibility and immediate recognition in clinical, research, and industrial settings.

Used on containers, doors, equipment, and signage in laboratories, hospitals, waste disposal facilities, and biosafety zones to communicate risk of exposure to harmful biological agents; matches user intent for safety compliance, hazard identification, or educational reference.