What is the Maximum Exposure Limit Concentration for nitrogen dioxide?

The correct answer is 5 ppm, which reflects the established Maximum Exposure Limit Concentration for nitrogen dioxide (NO2). This limit is based on health studies that underscore the potential hazards posed by nitrogen dioxide, primarily due to its role as a respiratory irritant and its association with other respiratory conditions.

In occupational settings, exposure to nitrogen dioxide should be controlled to prevent adverse health effects. The 5 ppm limit is designed to protect workers from the risks associated with prolonged or high-level exposure, which can lead to serious health issues, including inflammation of the airways and reduced lung function.

Understanding this limit is crucial for ensuring safety in environments where nitrogen dioxide may be present, such as in manufacturing, combustion processes, or in urban settings with high levels of vehicle emissions. Compliance with this standard helps maintain safe air quality and safeguards the health of individuals who may be exposed to this hazardous substance.