Which of the following is a common requirement for labeling biohazardous materials?

The requirement for labeling biohazardous materials typically includes the biohazard symbol, which serves as a standardized indicator that alerts personnel to the presence of biological hazards. This symbol is specifically designed to communicate the risks associated with handling or being in proximity to materials that may pose a threat to health or safety due to their biological content. It is essential in environments like laboratories, hospitals, or waste disposal facilities, as it helps ensure that individuals take the necessary precautions to prevent exposure, accidental release, or other safety incidents.

While other options may provide useful information in certain contexts, they do not fulfill the primary role of immediate hazard identification that the biohazard symbol does. Personal identification numbers, generic health hazards, and emergency contact information, while potentially relevant in other safety protocols, are not universally required elements of biohazard labeling. The focus on the biohazard symbol is crucial for effective communication of risks associated with biohazardous materials.