What information must the label of a hazardous chemical include before entering the workplace?

The correct response highlights the critical requirements for labeling hazardous chemicals to ensure safety in the workplace. The label must include the identity of the hazardous chemical, which allows workers to know exactly what they are handling. Appropriate hazard warnings are essential as they inform individuals about the risks associated with the chemical, including potential health hazards and safety precautions that need to be observed. Finally, the name and address of the manufacturer provide a point of contact for more information or in case of an emergency, enhancing the safety protocol for users of the chemical.

Including all of these components on a label helps to ensure compliance with regulatory standards like OSHA's Hazard Communication Standard, which aims to provide necessary information to protect workers' health and safety. Understanding the importance of these label requirements is crucial for anyone working with chemicals in an industrial or construction environment.