What is the explosion limits for propane gas?

The explosion limits for propane gas are indeed 2.4% to 9.5%. These limits define the concentration range of propane in air within which an explosion or combustion can occur. Below the lower limit (2.4%), the mixture is too lean to ignite, while above the upper limit (9.5%), the mixture is too rich for ignition. Understanding these limits is crucial for safety in handling and using propane, as they inform operators of the safe handling practices necessary to avoid risky situations that could lead to fires or explosions.

While the other options present different ranges, they do not correspond to the scientifically established explosion limits for propane and therefore do not provide accurate information regarding the safe handling thresholds for this gas.