What color placard is used for flammable liquids?

The color placard used for flammable liquids is red. This color is standardized to indicate a specific hazard and is easily recognizable by those in the industry, ensuring that the presence of flammable materials is clearly communicated. In the context of hazardous materials transportation, red placards are designated for substances that can ignite and produce flames, posing significant safety risks if not handled properly.

Yellow placards, on the other hand, typically signify reactive materials, while blue placards are associated with health hazards. Green placards are generally not used for hazardous materials in transport. Therefore, the use of red for flammable liquids ensures that first responders and personnel are immediately aware of the potential dangers associated with these substances.