Which of the following is not a characteristic of hazardous waste?

Hazardous waste is defined by specific characteristics that make it dangerous to human health or the environment. Among these characteristics are ignitability, corrosivity, and reactivity.

Ignitability refers to the ability of a substance to easily catch fire. This characteristic includes materials that are flammable at relatively low temperatures.

Corrosivity is the property of a substance to corrode or damage materials, including skin or metal. It describes wastes that can be acidic or alkaline enough to cause damage upon contact.

Reactivity is the characteristic of a waste that makes it unstable under normal conditions, potentially causing explosions or producing harmful gases when in contact with water or other substances.

Combustibility, while similar to ignitability, is not officially listed as a characteristic of hazardous waste under the Resource Conservation and Recovery Act (RCRA). Instead, ignitability encompasses the potential for a solid or liquid waste to combust. Therefore, while combustibility might generally imply the capacity to catch fire, it does not specifically serve as an established criterion for identifying hazardous waste in the regulatory framework. Hence, this makes it the correct answer for the question asked.