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Common Terms in Dangerous Goods


Short for “Dangerous Goods” – the term “DG” is used frequently in international transportation and storage.

Flash point

The lowest temperature at which flammable liquid ignited in the atmosphere when exposed to a source of ignition.

Explosive article

Any article containing one or more explosive substances.


An enclosure used by a single shipper to contain one or more packages and to form one handling unit.

Outer packaging

The outer protection of a composite or combination packaging together with any absorbent materials, cushioning and any other components necessary to contain and protect inner receptacles or inner packaging.

Pressurized Containers


Any container or vestibule that contains pressurized liquids or gasses of any kind. Pressurized containers can be considered dangerous goods even when evacuated and empty.  

UN Dangerous Goods Identification Number

Four-digit ID number that quickly identifies the specific dangerous good and any associated handling or special transportation needs.


Short for the United Nations “International Civil Aviation Organization”.


Short for “International Air Transport Association.”


Short for “Shippers Declaration of Dangerous Goods.” HazDecs are predefined declaration forms shippers must include when transporting DG items via air/sea.


Short for “International Maritime Organization”


Short for “Shipper’s Dangerous Goods Declaration.” DGDs are predefined declaration forms shippers must include went transporting DG by air/sea.


Short for “Hazardous Material,” used in reference to DG, most commonly in North America.

Reactive Substance


Any substance that may react to other specific substances nearby, especially when exposed to air, when improperly stored, or when the required storage container is compromised. Reactive substances may cause rapid energetic reactions, or slow reactions. Many reactive substances react strongly to other specific substances, such as water or other chemicals, and must be handled accordingly.

Hazardous Materials and Dangerous Goods Types