IMDG Dangerous Goods Finder (UN number to class)

Type a UN number, a proper shipping name, or a class in the search box, or filter the list by class. Select any result to expand its detail: the placard and marks, its marine-pollutant status, and links to the relevant IMDG class guidance. The finder covers more than 2,300 UN entries.

About This IMDG Dangerous Goods Finder

This IMDG dangerous goods finder is for shippers, freight forwarders, vessel cargo officers, and anyone checking a dangerous-goods declaration who needs the IMDG hazard class for a UN number fast. It searches more than 2,300 UN entries by UN number or proper shipping name and returns the IMDG class for each match, so a single page answers what previously needed one page per code.

The data follows the IMDG Code, the International Maritime Dangerous Goods Code, which is the SOLAS Chapter VII mandatory instrument for the carriage of packaged dangerous goods by sea, maintained by the IMO and updated on a two-year amendment cycle. Each entry pairs a UN number with its hazard class and proper shipping name. Type a UN number using digits only, type part of a substance name, or pick a class from the filter to narrow the list.

It replaces the per-code single-page lookups with one searchable reference, which is faster to use and stronger as a single authoritative page than hundreds of near-identical stubs. Each result shows the UN number, the proper shipping name, the IMDG class as a badge, and a short note. For packing group, segregation, stowage category, and the complete Dangerous Goods List, consult the current IMDG Code and the per-class wiki articles below.

Data source and accuracy

The UN numbers, proper shipping names, and hazard classes are UN-harmonized reference data compiled from the public-domain US Hazardous Materials Table (49 CFR 172.101), which aligns with the IMDG Code for the large majority of entries. A small number carry United States domestic class assignments that can differ from the IMO IMDG classification, and the set does not yet span the entire Dangerous Goods List. Treat this finder as a fast first reference, and confirm the entry against the current in-force IMDG Code before any classification, packing, segregation, or stowage decision.

Further reading

• IMDG marking, labelling, and placarding
• IMDG Class 2: gases
• IMDG Class 3: flammable liquids

Frequently asked questions

How do I find the IMDG class for a UN number?

Type the UN number (digits only, for example 1005) or the proper shipping name (for example ammonia) into the search box. The finder returns the matching entries with their IMDG hazard class.

Which dangerous goods does this cover?

It covers more than 2,300 UN entries with their IMDG hazard class, drawn from the UN-harmonized public Hazardous Materials Table. For packing group, segregation, stowage, and the definitive Dangerous Goods List, consult the current IMDG Code and the per-class wiki articles.