Dangerous good, abbreviated DG, (also known as hazardous material or hazmat) is any substance or material that is capable of posing an unreasonable risk to health, safety, and property when transported in commerce. Certain dangerous goods that pose risks even when not being transported are known as hazardous materials (abbreviated as HAZMAT or hazmat). Dangerous goods are indicated and can be identified by means of a UN Number. Disclaimer Our content is not in any way legal advice or binding. The information provided by might not be the official legal or full definition. Also when pursuing a specific transaction you are encouraged to conduct your own due diligence and to consult legal counsel as appropriate.