What temperature range is indicative of a flammable substance?

A temperature below 100 degrees Fahrenheit is indicative of a flammable substance because it typically represents the flash point, which is the lowest temperature at which a substance can vaporize to form an ignitable mixture in air. Substances that have a flash point below this temperature pose a significant fire hazard, as they can ignite easily in a variety of environments. Understanding this temperature threshold is crucial for safety in a nail technology setting where various chemicals are used, ensuring that proper handling and storage measures are in place to prevent accidents or fires.

The other temperature ranges would generally refer to substances that either do not ignite easily or fall into categories considered combustible rather than flammable. Hence, they do not represent the immediate fire danger that flammable substances do.