Biohazard Symbol - Official Warning Sign for Biological Hazards #1688915 (License: Personal Use)

This high-contrast black-and-white image displays the standard biohazard symbol-a trefoil of three interlocking arcs surrounding a central circle-paired with the word “BIOHAZARD” in bold stencil lettering. Created in 1966 by Charles Baldwin at Dow Chemical, the symbol was engineered for maximum visibility and memorability, regardless of language or literacy. It is universally used to mark biological substances that pose a threat to human health, including infectious agents, medical waste, and contaminated equipment.

Used on signage, lab equipment, medical waste containers, and safety documentation to alert personnel and the public to biological hazards. Matches user intent for hazard identification, safety training, regulatory compliance, or educational content about biosafety.