Biohazard Symbol - Universal Warning Sign for Biological Hazards #131645 (License: Personal Use)

This high-contrast red-on-white biohazard symbol consists of three interlocking circles radiating from a central point, forming a trefoil shape. Created in 1966 by Charles Baldwin at Dow Chemical, it was engineered to be unmistakable, even when inverted or viewed at a distance. It is standardized under ISO 3864-3 and OSHA regulations for labeling biological hazards including infectious agents, medical waste, and contaminated equipment.

Used on signage, lab equipment, medical waste containers, and safety documentation to alert personnel to potential exposure to pathogens or biohazardous materials; matches user intent for safety compliance, educational resources, or regulatory guidance.