What is the primary purpose of a Flash Point in materials?

The primary purpose of a flash point is to determine ignition hazard levels associated with flammable materials. The flash point is defined as the lowest temperature at which a material can vaporize to form an ignitable mixture in air. Understanding the flash point is critical for safety in handling, transporting, and storing flammable substances, as it helps identify the risk of fire under various temperature conditions. Knowing the flash point allows personnel to implement appropriate safety measures to prevent fires and manage risks effectively in environments where flammable materials are present.

While the other options pertain to temperature properties, they do not directly relate to the ignition hazard assessments that flash points provide. The freezing temperature and melting points are focused on physical state changes of the material, and safe storage temperatures, while important for overall safety and integrity of materials, do not specifically address the immediate risk of ignition associated with flammable substances.