At what percentage does the lower explosive limit (LEL) for ammonia start?

The lower explosive limit (LEL) for ammonia is an important safety threshold that indicates the minimum concentration of ammonia in air, below which a flammable mixture cannot be created. For ammonia, the LEL is typically cited as approximately 15% by volume in air. When the concentration of ammonia meets or exceeds this percentage, there is a risk of fire or explosion if an ignition source is present. Understanding the LEL is crucial for ensuring safe handling and storage of ammonia, as it helps in maintaining air quality and preventing hazardous situations.

Thus, recognizing that ammonia's LEL starts at 15% enables individuals and organizations to implement necessary safety measures to mitigate risks associated with its flammability.