What does the NFPA label with 0-4 ratings indicate in terms of hazard severity?

The NFPA (National Fire Protection Association) label uses a color-coded system to communicate the hazards associated with materials, indicated by a number system that ranges from 0 to 4. In this system, the ratings specifically denote hazard severity, with 0 representing minimal hazard and 4 indicating extreme hazard.

This means a material rated as 0 poses little or no risk under standard conditions, which may include being non-toxic, not flammable, or otherwise stable. Conversely, a material rated as 4 signifies an extreme hazard, requiring that it be handled with significant care, often necessitating special protective measures and procedures due to high toxicity, flammability, or reactivity.

Understanding these ratings is crucial for safety and risk assessment in environments where hazardous materials are present. Recognizing that a rating of 4 indicates severe dangers emphasizes the importance of following mandated safety protocols when dealing with such materials.