Which of the following is NOT considered a flammable liquid?

A liquid with a flash point of 150°F is not considered a flammable liquid because flammable liquids are typically defined as those that have a flash point below 100°F. The flash point is the lowest temperature at which the liquid can vaporize to form an ignitable mixture in air. Therefore, a liquid with a flash point of 150°F does not meet the threshold for classification as flammable.

In contrast, a liquid with a flash point below 100°F is classified as flammable because it can easily ignite at room temperature. Similarly, a liquid that easily ignites and burns or poses vapor hazards at room temperature also qualifies as flammable due to its potential to create dangerous conditions in a laboratory environment. Understanding these classifications is essential for safe handling and storage of chemicals in laboratories.