Which symbol indicates a flammable liquid hazard?

• A. The skull and crossbones.
• B. The health hazard symbol.
• C. The exploding bomb.
• D. The flame pictogram used on Class 3 labels.

Answer: (D)

The ability to recognize hazard types quickly comes from standardized pictograms used in labeling. For flammable liquids, the flame symbol is used. This flame pictogram on Class 3 labels signals that the material can ignite easily at typical conditions, so it tells handlers to avoid heat, sparks, and other ignition sources and to store and handle the liquid with appropriate precautions. The skull and crossbones marks acute toxicity, the health hazard symbol indicates broader health risks, and the exploding bomb marks explosives—none of which describe flammable liquids. So the flame pictogram is the correct indicator for a flammable liquid hazard.