Hazardous Material is commonly referred to as HAZMAT or Dangerous Goods by industry and the U.S. Government. Occupational Safety & Health Administration (OSHA) in 29 CFR 1910.1200, and GSA in FED-STD-313 define Hazardous Material as:
Any item or chemical which is a "health hazard" or "physical hazard", including the following:
Any item or chemical which, when being transported or moved, is a risk to public safety or is an environmental hazard, and is regulated as such by one or more of the following:
HAZMAT also includes any item or chemical which is reportable or potentially reportable or noticeable as inventory under the reporting requirements of the Hazardous Chemical Reporting (40 CFR Part 302), or as an environmental release under the reporting requirements of the Toxic Chemical Release Reporting: Community Right To Know (40 CFR Part 372).
These include chemicals with special characteristics which, in the opinion of the manufacturer, can cause harm to people, plants, or animals when released by spilling, leaking, pumping, pouring, emitting, emptying, discharging, injecting, escaping, leaching, dumping, or disposing of in the environment (including the abandonment or discarding of barrels, containers, and other receptacles).
Also, HAZMAT includes an item or chemical if it is a special nuclear source or by-product material as defined in 10 CFR, or is regulated or referred to as radioactive.