What must be displayed on a placard for a corrosive material?

A placard for a corrosive material must indeed display a white background with a dripping symbol. This design is specifically standardized to help quickly identify the nature of the hazardous material being transported. The white background signifies that it is a corrosive substance, while the dripping symbol represents the potential for material to cause damage to living tissue or materials upon contact.

Proper placarding is crucial for safety during transportation. It allows emergency responders and personnel to recognize the hazards immediately and take appropriate measures to handle the material safely. The other options do not accurately represent the required placarding for corrosive materials. For instance, the yellow background with a skull symbol is typically associated with toxic substances, the red background with flames denotes flammable materials, and the blue background with an explosion symbol is used for explosive substances. Each of these designs serves a specific purpose in indicating different hazardous materials, further underscoring the necessity of correct labeling for safety compliance and emergency readiness.