How is "chemical reactivity" defined in relation to hazardous materials?

Chemical reactivity refers to the potential of a substance to undergo chemical changes or reactions when exposed to certain conditions or other substances. This concept is critical in hazardous materials management, as substances that are highly reactive can pose significant safety risks, potentially leading to explosions, the release of toxic byproducts, or other harmful outcomes when they come into contact with incompatible materials or are subjected to heat, pressure, or other environmental factors.

The correct answer highlights this potential for chemical change, which is the essence of reactivity. Understanding a material's reactivity is essential for properly handling, storing, and disposing of hazardous substances to prevent accidents and ensure safety in emergency situations. This knowledge forms the foundation of safe practices for those working with or responding to hazardous materials.