Chemical waste is any excess, unused, or unwanted chemical.[1] Chemical waste may be classified as hazardous waste,[2] non-hazardous waste, universal waste, or household hazardous waste, each of which is regulated separately by national governments and the United Nations.[3]Hazardous waste is material that displays one or more of the following four characteristics: ignitability, corrosivity, reactivity, and toxicity. This information, along with chemical disposal requirements, is typically available on a chemical's Safety Data Sheet (SDS). Radioactive and biohazardous wastes require additional or different methods of handling and disposal, and are often regulated differently than standard hazardous wastes.
