Hazard symbols are graphical representations used to communicate the presence of potential dangers associated with various substances or activities. These symbols help people quickly identify risks, such as chemical hazards, biological threats, or physical dangers. Common examples include the skull and crossbones for toxic substances and the flame symbol for flammable materials. These symbols are often found on labels, safety data sheets, and warning signs in workplaces and public areas. Understanding hazard symbols is essential for ensuring safety and compliance with regulations, such as those set by the Occupational Safety and Health Administration (OSHA) or the Globally Harmonized System (GHS).