In general, which is more hazardous: a material with a low minimum ignition energy (MIE) or a high MIE?

In general, which is more hazardous: a material with a low minimum ignition energy (MIE) or a high MIE?

• A. High MIE
• B. Low MIE
• C. Both equally hazardous
• D. Neither

Answer: (B)

Ignition energy and hazard: the lower the minimum ignition energy, the easier it is for a material to ignite. If a material has a low MIE, a small spark, static discharge, or modest heat source can start a flame, making it more hazardous in real-world handling and processing. A high MIE means you need a much larger energy input to ignite, so ignition is less likely under normal conditions and the material is less hazardous from this perspective. So, in general, a material with a low MIE is more hazardous than one with a high MIE.

Ignition energy and hazard: the lower the minimum ignition energy, the easier it is for a material to ignite. If a material has a low MIE, a small spark, static discharge, or modest heat source can start a flame, making it more hazardous in real-world handling and processing. A high MIE means you need a much larger energy input to ignite, so ignition is less likely under normal conditions and the material is less hazardous from this perspective. So, in general, a material with a low MIE is more hazardous than one with a high MIE.