How are combustible liquids classified based on their flashpoints?

The classification of combustible liquids is primarily determined by their flashpoint, which is the lowest temperature at which a liquid produces enough vapor to ignite in air. According to the classifications established by organizations like the National Fire Protection Association (NFPA), liquids are categorized based on their flashpoints as follows:

1. Liquids with flashpoints below 100°F are classified as flammable liquids, not combustible. These liquids can ignite easily at room temperature and pose significant fire hazards.

2. The correct classification for combustible liquids includes those with flashpoints above 100°F and below 200°F. This category identifies liquids that can ignite and burn but require a higher temperature to produce ignitable vapors.

3. Flashpoints exactly at 100°F do not create a separate category, as they fall into the flammable range.

4. Liquids with flashpoints above 200°F are recognized as non-flammable liquids, meaning they do not produce ignitable vapors under typical conditions.

Understanding these classifications is essential for handling, storing, and working with various types of liquids safely in environments where fire hazards may pose risks. Thus, the correct choice recognizes the crucial range of flashpoints that categorize combustible liquids effectively.