What is an example of a flammable substance in HAZMAT?

Gasoline is considered a flammable substance in HAZMAT because it can easily ignite and burn due to its low flash point, which is the temperature at which it can produce enough vapor to form an ignitable mixture with air. This property makes gasoline a significant fire hazard when stored, transported, or used in various applications.

In contrast, while paper can burn, it requires a sustained ignition source and doesn't possess the same risk factor or hazardous classification that gasoline does in a HAZMAT context. Water, being a non-flammable substance, does not pose a fire risk, and glass is not flammable either, as it is an inert material. Thus, gasoline stands out as the quintessential example of a flammable substance in terms of hazardous materials.