When researching a product's flame potential, which property should you identify?

• A. Flashpoint
• B. Boiling Point
• C. Melting Point
• D. Ignition Temperature

Answer: (A)

The key idea is that a liquid’s flame potential is determined by the temperature at which its vapors can form an ignitable mixture with air. That temperature is the flashpoint—the lowest temperature at which enough vapor is produced to ignite if there’s an ignition source present. Knowing the flashpoint directly tells you how easily the product can ignite under common handling and storage conditions, which is central to assessing fire hazard and required controls.

Boiling point shows when a liquid turns to vapor, but vapors can ignite at temperatures well below the boiling point, so this doesn’t measure flammability risk as directly. Melting point is about phase change for solids and isn’t about flammable vapors. Ignition temperature (autoignition temperature) indicates the temperature needed for spontaneous ignition without a flame, which is a different scenario from the typical flame potential of vapors in air. Hence, flashpoint is the most relevant property for assessing flame potential.