What does the hazard classification system primarily indicate?

The hazard classification system primarily indicates the potential hazards of materials. This system categorizes substances based on the level of risk they pose to health, safety, and the environment. By identifying and classifying hazards, first responders and emergency personnel can effectively assess the risks associated with handling specific materials. This classification helps in determining the appropriate response measures, necessary personal protective equipment, and potential containment strategies in the event of a spill, leak, or incident involving hazardous materials.

The other options focus on aspects that are not related to the fundamental purpose of the hazard classification system. For instance, the size of the shipment, shipping costs, and the origin of the materials do not provide crucial information about the safety or risk associated with the materials themselves. Instead, it is the classification that informs first responders of what they might be dealing with, allowing them to take informed actions during emergencies involving hazardous substances.