What is the primary purpose of labeling hazardous materials during transport?

The primary purpose of labeling hazardous materials during transport is to identify the nature of the hazard. Proper labeling is crucial for ensuring the safety of everyone involved in the transportation process, including handlers, emergency responders, and the public. Labels provide essential information about the type of hazard a material poses, such as whether it is flammable, toxic, corrosive, or an environmental hazard. This information allows for safe handling procedures and appropriate response actions in case of an incident, ultimately protecting lives and the environment.

In contrast, the other options focus on aspects that are not related to the safety and regulatory requirements of transporting hazardous materials. Marketing information, product pricing, and manufacturer advertising are not relevant to the essential function of informing individuals about hazards, which is critical in preventing accidents and ensuring safe operations.