Which class of combustible liquids includes those with flash points at or above 100°F and below 140°F?

The classification of combustible liquids is based on their flash points, which is the lowest temperature at which they can vaporize to form an ignitable mixture in air. In this context, liquids that fall into the category of Class II combustibles have flash points that range from 100°F to 140°F. This defines them as liquids that can pose a fire risk under certain conditions but are not as volatile as Class I liquids, which have lower flash points.

Class II liquids require care in handling and storage, but they are less hazardous compared to Class I liquids that have flash points below 100°F. Understanding this classification is important for implementing appropriate safety measures and regulatory compliance in workplaces where these substances are present. Recognizing that Class II includes liquids in the specified temperature range helps in assessing their potential risk and determining safe handling practices.

Classes III and IV further categorize liquids with higher flash points, indicating they are less volatile and typically have different safety requirements. Therefore, Class II is correctly identified as encompassing liquids with flash points at or above 100°F and below 140°F.