Which chemicals fall under the Class B flammables category?

Class B flammables are defined as liquids with a flashpoint less than 38 degrees Celsius, which includes a range of common solvents and alcohols. The correct option, which lists acetone, ethanol, and methanol, aligns with this definition.

Acetone is widely used in laboratories as a solvent and has a flashpoint of around 20 degrees Celsius, making it highly flammable. Ethanol, commonly used in various applications, also has a flashpoint of approximately 13 degrees Celsius. Methanol, another important laboratory chemical, has a flashpoint of around 11 degrees Celsius. All of these liquids not only have low flashpoints, classifying them as Class B flammables, but they also present significant fire hazards that require proper handling and storage in laboratory environments.

In contrast, the other options do not adequately represent Class B flammables. For instance, while ether and isopentane are both highly flammable, they do not represent the primary class that includes the most common laboratory solvents. Propane and butane, though flammable gases, typically fall under different classifications in scenarios where they are stored under pressure as liquefied gases. Lastly, gasoline and diesel, although flammable, also fall under Class