Guides - 06

Dangerous goods: classes and documents

Many ordinary products are dangerous goods in transport: paints, perfumes, batteries, aerosols, some chemicals. They can travel, but only when classified, packed, marked and declared correctly.


Engraving-style illustration of drums, gas cylinders and crates lashed on a ship's deck.
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01

The nine classes

Class 1Explosives
Class 2Gases
Class 3Flammable liquids
Class 4Flammable solids and substances that react dangerously
Class 5Oxidising substances and organic peroxides
Class 6Toxic and infectious substances
Class 7Radioactive material
Class 8Corrosives
Class 9Miscellaneous dangerous goods, including lithium batteries
02

What a shipment needs

  • Safety data sheet (SDS) - from the manufacturer. It shows the classification.
  • UN number and proper shipping name - the four-digit number that identifies the substance.
  • Packing group - I, II or III, for high, medium or low danger, where the class uses them.
  • Approved packaging, marks and labels - as the rules set out for the substance.
  • Dangerous goods declaration - signed by the shipper, travelling with the shipment.
03

Sea and air are different

By sea, dangerous goods travel under the IMDG Code. By air, they travel under the IATA Dangerous Goods Regulations, which are stricter: some goods that can go by sea cannot fly at all, and quantity limits are lower. Carriers, vessels and airlines can also set their own restrictions above the rules.

04

Where we come in

We check whether your goods can travel by the planned route and mode, book with carriers that accept the class, and coordinate packing, marking and the declaration with licensed dangerous goods handlers. Send us the safety data sheet first.

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Next guide: Hong Kong trade declarations

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Tell us the cargo, the route and the dates. We will reply by email with what we can arrange.