Biohazard Symbol - Universal Warning Sign for Biological Hazards #58637 (License: Personal Use)

This high-contrast black-and-white symbol consists of three overlapping circles arranged radially around a central circle, forming a trefoil shape with sharp, curved edges. Created in 1966 by Charles Baldwin at Dow Chemical, it was engineered for maximum visibility and memorability, intentionally avoiding cultural or religious motifs. It is standardized under ISO 3864-3 and OSHA guidelines for labeling infectious agents, medical waste, and containment zones.

Used on laboratory equipment, biohazard waste containers, PPE signage, and emergency response materials; matches user intent for safety compliance, educational content, or hazard identification resources.