Define "reactivity" as it pertains to hazardous waste.

Reactivity in the context of hazardous waste refers to the tendency of a substance to undergo a chemical reaction, which can lead to violent events such as explosions or the release of toxic gases. Waste that is classified as reactive can react vigorously with water, or it may undergo highly exothermic reactions under certain conditions, posing significant risks during storage, handling, or disposal. Identifying and managing reactive wastes is crucial in hazardous waste operations to prevent accidents and ensure the safety of personnel and the environment.

The other definitions provided in the choices do not align with the hazardous characteristics of reactivity. For instance, a waste described as stable and non-reactive does not possess the qualities that would classify it as hazardous due to reactivity. Similarly, a waste that produces minimal emissions or is safe to mix with other substances does not describe the dangerous potential associated with reactive materials. Understanding these concepts is essential for effective waste management and compliance with regulations governing hazardous waste.