What color is commonly associated with flammable materials in hazard labeling?

Red is the color commonly associated with flammable materials in hazard labeling. This color is used universally to indicate flames and fire hazards, making it clear that the materials can ignite easily and pose significant risks in the event of exposure to heat or flames. The use of red as a warning color helps ensure that workers and individuals interacting with potentially dangerous materials are quickly alerted to the need for caution and appropriate safety measures. This practice is essential for maintaining a safe working environment, particularly in industrial and manufacturing settings where flammable substances are present. Thus, the association of red with flammability is a crucial part of hazard communication in various industries.