What does the blue section of the NFPA label signify?

The blue section of the National Fire Protection Association (NFPA) label specifically signifies health hazards associated with a substance. The NFPA system uses a color-coded scheme with a diamond shape divided into four sections, where each section represents a different type of hazard. The blue section is dedicated to gauging the level of health risk posed by exposure to the material, using a numerical scale ranging from 0 (no hazard) to 4 (deadly hazard). Understanding the health hazard level is crucial for responders and handlers to implement the appropriate safety measures while dealing with potentially hazardous substances. This label informs personnel about the dangers to human health, enabling them to take necessary precautions to minimize exposure and potential health effects.