Meta Description: Learn how to ship dangerous goods internationally the right way. From IMDG to IATA DGR, this guide covers classification, packaging, labeling, and compliance. (For SEO plugin — not displayed)
Key Takeaways
- Knowing how to ship dangerous goods internationally starts with correctly classifying your cargo under UN dangerous goods categories.
- Sea freight follows the IMDG Code; air freight follows IATA DGR — each with distinct packaging and labeling requirements.
- A licensed Dangerous Goods Declaration (DGD) must accompany every shipment.
- Packaging must meet UN-certified standards; mislabeling is one of the top causes of rejected or seized shipments.
- Working with a trained freight forwarder or a certified DG handler dramatically reduces your compliance risk.
Understanding How to Ship Dangerous Goods Internationally
Knowing how to ship dangerous goods internationally is non-negotiable for specialized shippers dealing with chemicals, batteries, flammable liquids, aerosols, or pressurized containers. Get it wrong and you face cargo rejection, port detention, heavy fines, or worse — a safety incident in transit. The good news: with the right knowledge, the process is systematic and manageable.
Dangerous goods (DG), also called hazardous materials or hazmat, are substances that pose a risk to health, safety, property, or the environment during transport. The two main international frameworks that govern this are the IMDG Code (International Maritime Dangerous Goods Code) for sea shipments and the IATA Dangerous Goods Regulations (DGR) for air shipments. Road and rail transport follows ADR and RID respectively at the regional level.
Step 1: Classify Your Dangerous Goods Correctly
Every DG shipment begins with classification. The UN Model Regulations divide dangerous goods into nine classes:
- Class 1 — Explosives
- Class 2 — Gases (flammable, non-flammable, toxic)
- Class 3 — Flammable Liquids
- Class 4 — Flammable Solids
- Class 5 — Oxidizing Substances & Organic Peroxides
- Class 6 — Toxic & Infectious Substances
- Class 7 — Radioactive Material
- Class 8 — Corrosives
- Class 9 — Miscellaneous Dangerous Goods (including lithium batteries)
Each class has a UN number and a Proper Shipping Name (PSN). These must appear on all shipping documentation and package labels. In our experience, misclassification — especially for lithium batteries (UN 3480 / UN 3481) and aerosols — is among the most common errors that lead to shipment delays.
Step 2: Choose the Right Mode of Transport
Your mode of transport determines which regulatory framework applies:
- Sea freight: The IMDG Code (International Maritime Organization) is the binding global standard. It is updated every two years and covers stowage, segregation, and emergency response.
- Air freight: IATA DGR is the most restrictive framework. Many substances that can travel by sea are banned from air entirely. Always cross-check the IATA Dangerous Goods Regulations table before booking air cargo.
- Road/rail: Regional frameworks like ADR (Europe) apply for the land leg of multimodal shipments.
A common trap we see: shippers assume if a product clears sea regulations, it will clear air regulations too. It does not. Lithium batteries, for example, face far stricter state-of-charge and quantity limits on passenger aircraft.
Step 3: Use UN-Certified Packaging
Packaging is where many small exporters cut corners — and where authorities focus their inspections. All outer packaging for DG shipments must carry a UN performance mark, indicating it has passed drop, stack, and leakproofness tests. The mark looks like this: UN 4G/Y45/S/22/USA/AB1234 — each segment encodes the packaging type, performance level, and certifying body.
Inner packaging, cushioning, absorbent materials, and compatibility between the substance and the container all matter. When in doubt, work with a certified packaging supplier who specializes in hazmat compliance.
Step 4: Label and Mark Packages Correctly
Each outer package must carry:
- The correct hazard label(s) (diamond-shaped, class-specific)
- The UN number prefixed with “UN” (e.g., UN 1203 for gasoline)
- The Proper Shipping Name
- The shipper’s and consignee’s full name and address
- Net quantity or net weight of the dangerous substance
- Any required orientation arrows for liquid contents
Labels must be at least 100mm x 100mm for most classes. Do not cover, fold, or obscure any part of a hazard label — inspectors will reject the package on sight.
Step 5: Prepare the Dangerous Goods Declaration (DGD)
The Shipper’s Declaration for Dangerous Goods (also called a Dangerous Goods Declaration or DGD) is the core compliance document. It must be:
- Completed in English (regardless of origin country)
- Signed by a trained and, in many jurisdictions, certified dangerous goods professional
- Submitted to the carrier before booking confirmation
For air shipments, IATA provides a standard DGD format. For sea, the IMDG Code specifies required fields in the Multimodal Dangerous Goods Form. Airlines and shipping lines will not accept cargo without a correctly completed DGD.
Step 6: Work with the Right Partners
Dangerous goods compliance is not a solo exercise. You need:
- A licensed freight forwarder with DG handling certification — see our guide on how to use a freight forwarder effectively to find the right partner.
- A customs broker familiar with destination-country hazmat import rules.
- A DG trainer or consultant if your team handles packing and documentation in-house.
If you are exporting physical goods such as handmade or artisan products that include regulated components — paints, lacquers, or finishing chemicals — TheExporter.co supplies high-quality, authentic Indonesian goods ready for international export. Our product range is designed with clean supply chain documentation in mind.
Common Pitfalls & Expert Tips
Pitfall 1 — Assuming all countries accept the same DG classes. Many nations maintain national restrictions on top of IMDG or IATA. Saudi Arabia, for example, has additional labeling requirements. Always verify destination-country rules before booking.
Pitfall 2 — Treating lithium batteries as low-risk. Batteries are Class 9, but airlines have strict state-of-charge limits (30% for certain categories) and quantity caps per package. In our experience, this is the fastest route to a cargo rejection at the airline acceptance counter.
Pitfall 3 — Outdated packaging stock. UN-certified packaging has date codes. Using expired or non-compliant inner packaging voids the UN mark on the outer box. Audit your DG packaging stock every quarter.
Expert Tip: Consider using software like Labelmaster’s DGIS or Hazmat Manager to automate classification lookups, DGD generation, and regulatory updates. The cost of compliance software is far lower than a single fine or shipment seizure. Also review your product-specific compliance requirements — exporters of cosmetics, aerosols, and similar goods face the most complex DG overlap.
Frequently Asked Questions
What qualifies as dangerous goods in international shipping?
Any substance or article that poses a risk to health, safety, property, or the environment falls under dangerous goods. This includes lithium batteries, flammable liquids, gases, corrosives, infectious substances, and radioactive materials, among others. The full list is maintained in the UN Model Regulations and updated every two years.
Do I need special training to ship dangerous goods internationally?
Yes. Both IMDG and IATA require that personnel involved in classifying, packing, marking, labeling, and documenting DG shipments complete approved training. Training must be renewed every two years for air (IATA) and recurrently for sea (IMDG). Many countries also require shipper certification at the national level.
Can I ship dangerous goods by air?
Some classes are permitted on cargo-only aircraft, others on passenger aircraft in limited quantities, and some are completely prohibited by air. Always consult the IATA DGR Packing Instructions specific to your UN number before booking air freight for any DG cargo.
What happens if my dangerous goods shipment is rejected?
Rejection typically means the carrier returns or holds the cargo at your cost. Depending on the severity of the violation, you may also face fines, license suspension, or blacklisting from the carrier. In serious cases, national authorities can initiate legal proceedings. Prevention through proper compliance is always less expensive than remediation.
What is a Dangerous Goods Declaration and who must sign it?
A Dangerous Goods Declaration (DGD) is a shipper-completed document certifying that the cargo has been properly classified, packed, labeled, and marked according to the applicable regulations. It must be signed by the shipper or a person authorized by the shipper who has completed the required DG training. Unsigned or incorrectly completed DGDs are grounds for immediate cargo rejection.
