What does a blue label indicate in the NFPA system?

In the NFPA (National Fire Protection Association) labeling system, a blue label signifies a health hazard. This system uses a color-coded diamond with four quadrants, each representing a different type of hazard. The blue section is specifically designated for health risks, indicating the degree of danger that the substance poses to human health. The hazard level is rated on a scale from 0 to 4, with 0 indicating no hazard and 4 indicating a severe hazard.

Understanding the significance of each color and how it relates to potential hazards is crucial for effective emergency response and safety planning. The blue label helps responders identify substances that may pose a risk if inhaled, absorbed, or ingested, thereby enabling them to take appropriate protective measures when dealing with hazardous materials. This is essential for ensuring the safety of personnel working in environments where such materials are present.