Which square on the NFPA Diamond represents health hazards?

The NFPA Diamond is a visual representation used to convey the hazards of materials in terms of health, flammability, reactivity, and specific hazards. In this system, each colored square has a specific meaning. The left square of the diamond is designated for health hazards. This square is often colored blue, and it displays a numerical rating ranging from 0 to 4, with higher numbers indicating more severe health risks associated with exposure to the substance in question.

Understanding the layout of the NFPA Diamond is crucial for interpreting the hazards quickly and effectively. The top square signifies flammability hazards, the right square indicates reactivity, and the bottom square denotes specific hazards, such as radiation or acid. The left square, focusing on health hazards, serves as an essential indicator for safety protocols and emergency responses when handling potentially harmful substances.