What term is used to describe a chemically reactive substance?

The term "corrosive" is indeed used to describe a chemically reactive substance. Corrosive materials are capable of reacting with and possibly destroying other substances, such as metals, skin, and other materials. This reactivity is often due to their ability to undergo chemical reactions that break down the structure of other compounds.

In the context of chemical behavior, a corrosive substance typically has strong acids or bases that can engage in reactions leading to degradation, which underscores their highly reactive nature. This characteristic can often lead to significant changes in the physical and chemical properties of the substances they encounter. Understanding corrosive materials is essential in various fields, including chemistry, materials science, and industrial applications, as they can pose safety hazards if not handled properly.