Labels indicate what kind and how much radioactive material is inside the package. Placards are more durable standard hazmat identifiers, designed to meet certain specifications, and placed on outer containers, trucks, cylinders, or other vehicles used for transport.

CLASS 3 Flammable Liquid and Combustible Liquid\n\n For FLAMMABLe, placard 454 kg (1,001 lbs) or more. gASOLIne may be used in place of FLAMMABLe placard displayed on a cargo tank or portable tank transporting gasoline by highway. Placard combustible liquid transported in bulk.