What percentage of methane is recognized as the most explosive in air?

The most explosive concentration of methane in air, often referred to as its lower explosive limit (LEL), is approximately 5% by volume. However, the most explosive or optimum mix where the methane-air mixture is most sensitive to ignition is around 9.46%. This range is critical because it identifies the concentration at which methane mixed with air is most likely to ignite and cause an explosion when exposed to a spark or flame.

This value is significant for safety and regulatory standards in various industries, particularly those involved in natural gas extraction, storage, and transportation. Understanding this percentage helps professionals manage risks associated with methane's flammability and implement appropriate safety measures.