How is hazardous material shipped as cargo identified?

Hazardous material shipped as cargo is identified primarily by markings, placards, and labels. This system is critical for ensuring safety in transportation and handling, as it provides immediate visual cues about the nature of the materials being transported.

Markings on containers give essential information about the type of hazardous material and specifications that must be followed during handling and transport. Placards are large signs displayed on vehicles or containers that identify the hazard class of the material in a clear and standardized manner. Labels, smaller than placards, provide detailed information about the specific hazards associated with the material, such as toxicity, flammability, or reactivity.

This system allows those involved in the transportation and handling process—such as shippers, transporters, and emergency responders—to quickly identify hazards, understand necessary precautions, and take appropriate actions to mitigate risks. By contrast, other options like size and weight, color coding, shapes, or temperature control methods do not provide comprehensive or standardized identification of hazardous materials, which is critical for maintaining safety throughout the logistics chain.