Which of the following is a characteristic of flammable chemicals?

Flammable chemicals are defined by their ability to easily ignite and sustain combustion when exposed to an ignition source. The characteristic that they catch fire easily in any form is fundamental to understanding how to handle and store these materials safely. These chemicals can vapors, liquids, or solids, but they all share the trait of having a low flash point—the minimum temperature at which they can create enough vapor to ignite in air.

Recognizing that flammable chemicals can ignite easily highlights the importance of following safety protocols, such as keeping them away from heat sources, using appropriate storage containers, and implementing proper ventilation systems. This knowledge is crucial for maintaining a safe work environment and adhering to OSHA standards.

The other options either misrepresent the properties of flammable chemicals or suggest scenarios that are not typical characteristics of these substances. For instance, suggesting that flammable chemicals explode upon impact with water is misleading; while certain reactive chemicals may have hazardous reactions with water, this is not a general property of flammable substances. Emitting toxic fumes at high temperatures is related to decomposition rather than combustibility, and the claim of being stable regardless of conditions contradicts the very definition of being flammable.