What is the fire diamond rating for pure ammonia regarding health?

The fire diamond rating system, also known as the National Fire Protection Association (NFPA) label, is designed to provide quick and easily identifiable information about the hazards associated with materials, including their health risks.

For pure ammonia, a rating of health 3, represented by the color blue, indicates a high degree of danger. This means that exposure to ammonia can cause serious health effects, including potential damage to the lungs if inhaled, and it may cause severe injuries upon contact with skin or eyes. The health rating of 3 signifies that significant exposure can lead to health issues or even fatality without immediate intervention.

Using the other options for context, a health rating of 2 (red) would suggest that the material poses a moderate risk, which is not the case with ammonia, as it is noticeably more hazardous. A health rating of 1 (yellow) implies slight hazard potential, and a health rating of 4 (green) indicates the most severe hazards, all of which do not align with ammonia's risk profile. Therefore, the classification of health 3 accurately reflects the significant health risks associated with exposure to ammonia.