You are loading a cargo tank on your container ship. The tank displays the red label as shown in illustration D023DG below. Which statement is TRUE?

Correct Answer: Option C — The tank contains propylene.

Propylene is classified as a flammable gas requiring a red placard/label under hazardous materials regulations. Portable tanks carrying liquefied flammable gases display this warning, and identification numbers correlate directly to specific hazardous cargoes listed in 49 CFR 172.101.