UN Number Lookup
Enter a UN number or part of the product name, in English or Portuguese, to see the proper shipping name, hazard class, subsidiary hazard and packing group. Free, no sign-up.
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Enter a UN number (e.g. 1203) or part of the name (e.g. acetone).
This lookup is an introduction: it shows only the basic classification. Transport rules are updated periodically and may change. The classification, packaging and documentation of each shipment follow the product's Safety Data Sheet (SDS) and the regulations in force for the mode of transport. If in doubt, get in touch.
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Classification, documentation and booking of dangerous goods in containers, ISO tanks or by air.
How to read the result
Class or division: the product's primary hazard (1 to 9). In class 1, the letter is the compatibility group.
Subsidiary hazard: other hazards the product also presents, which call for an additional label.
Packing group: I (high danger), II (medium danger) or III (low danger). Blank when it does not apply, as for gases and articles.
The same number may appear in more than one entry when the concentration, physical state or packing group changes the classification.
Free resource
Poster: The 9 IMO Hazard Classes
Each class's labels, example products and the most common shipping mistake, as a print-ready PDF.
English edition in preparation.
Source: UN Recommendations on the Transport of Dangerous Goods, Rev. 23 (2023) · Portuguese names: ANTT · updated 2026-10-08.Data: United Nations, Recommendations on the Transport of Dangerous Goods — Model Regulations, Rev. 23 (2023), chapter 3.2. Portuguese names: ANTT (Brazil's National Land Transportation Agency), Resolution No. 5,998/2022, as amended.