Biohazard Symbol - Official Warning Sign for Biological Hazards #1688782 (License: Personal Use)

This high-contrast black-on-orange biohazard symbol is the standardized warning icon defined by ISO 3864 and used worldwide to indicate the presence of biological substances that pose a threat to human health. Its distinctive trefoil shape ensures immediate recognition, even under stress or low visibility conditions, and is mandated on containers, equipment, and facilities handling infectious agents, medical waste, or recombinant DNA materials. The design was created in 1966 by Charles Baldwin at Dow Chemical to be intuitively understood across language barriers.

Used on lab doors, sharps containers, biosafety cabinets, and hazardous waste labels; matches user intent for safety compliance, hazard identification, educational resources, or regulatory guidance.