Dangerous Goods Shipping IMDG, IATA & HAZMAT Guide
Lithium batteries, chemicals, perfumes, paint, aerosols — thousands of everyday products are classified as dangerous goods. Ship them wrong, and you face fines up to $500,000, cargo seizure, and criminal liability. Ship them right, and they move as smoothly as any other freight.
What Are Dangerous Goods (DG)?
Dangerous goods — also called hazardous materials (HAZMAT) — are substances or articles that pose a risk to health, safety, property, or the environment during transportation. They are regulated by international frameworks: IMDG Code for ocean freight, IATA DGR for air freight, and ADR/DOT for ground transport.
The classification system divides dangerous goods into 9 classes based on the primary hazard. Some products fall into multiple classes. Even seemingly harmless items like perfume (Class 3 — flammable liquid), nail polish remover, or lithium batteries in laptops (Class 9 — miscellaneous) are regulated as DG.
In the United States, the Department of Transportation (DOT) regulates the shipment of hazardous materials through the Hazardous Materials Regulations (HMR), codified in Title 49 of the Code of Federal Regulations (49 CFR). Anyone who ships hazardous materials — whether by air, ocean, road, or rail — must comply with these regulations, which cover classification, packaging, labeling, documentation, and emergency response procedures.
The 9 Classes of Dangerous Goods
| Class | Hazard Type | Common Examples |
|---|---|---|
| Class 1 | Explosives | Fireworks, ammunition, flares, airbag inflators |
| Class 2 | Gases | Propane, aerosols, fire extinguishers, CO₂ cylinders |
| Class 3 | Flammable Liquids | Perfume, paint, alcohol, adhesives, gasoline |
| Class 4 | Flammable Solids | Matches, magnesium, sodium batteries, metal powders |
| Class 5 | Oxidizers & Organic Peroxides | Bleach, pool chemicals, hydrogen peroxide, fertilizers |
| Class 6 | Toxic & Infectious Substances | Pesticides, medical waste, biological samples, cyanide |
| Class 7 | Radioactive Material | Medical isotopes, smoke detectors, industrial gauges |
| Class 8 | Corrosives | Battery acid, sulfuric acid, mercury, cleaning compounds |
| Class 9 | Miscellaneous DG | Lithium batteries, dry ice, magnetized materials, engines |
How to Ship Dangerous Goods — Step by Step
- Classify your product: Identify the UN number, proper shipping name, class, packing group, and any special provisions. Use the IMDG Code (ocean) or IATA DGR (air) to look up your substance. If unsure, a DG specialist or your freight forwarder can help classify.
- Choose compliant packaging: DG must be packed in UN-certified packaging that matches the packing group (I, II, or III). Packaging must pass drop tests, pressure tests, and stacking tests. Inner containers need absorbent material, and the outer packaging must display correct DG marks and labels.
- Mark and label the packages: Apply the correct hazard class diamond labels, UN number markings, proper shipping name, and any orientation arrows (for liquids). Air freight has additional labeling requirements including 'Cargo Aircraft Only' labels when applicable.
- Prepare the DG declaration: Complete the Dangerous Goods Declaration (DGD) — also called the Shipper's Declaration for Dangerous Goods. This legal document certifies the cargo is correctly classified, packaged, marked, labeled, and in proper condition for transport. The shipper is legally liable for accuracy.
- Select a DG-certified carrier: Not all carriers accept dangerous goods, and those that do may restrict certain classes. Verify that your carrier, freight forwarder, and any transshipment points can handle your specific DG classification. Air carriers are especially restrictive.
- Book and provide documentation: Submit the DG declaration, SDS (Safety Data Sheet), commercial invoice, packing list, and any required permits to your freight forwarder at least 48-72 hours before cargo ready date. Late or incomplete documentation causes automatic rejection.
- Track compliance through delivery: DG shipments may face additional inspections at origin, transshipment, and destination. Maintain copies of all DG documentation for at least 2 years. Report any incidents (leaks, damage, temperature excursions) immediately to the carrier and relevant authority.
Shipping Dangerous Goods?
We coordinate IMDG, IATA DGR, and DOT hazmat shipments through our certified partner network. Get compliant DG shipping rates for any class.
DG Shipping by Mode — Key Differences
| Factor | Ocean (IMDG) | Air (IATA DGR) | Ground (DOT/ADR) |
|---|---|---|---|
| Governing body | IMO | ICAO / IATA | DOT (US) / ADR (EU) |
| Quantity limits | Higher — full containers allowed | Very strict — per-package limits | Moderate — varies by class |
| Packaging standards | UN-certified required | Strictest — additional air pressure testing | UN-certified required |
| Documentation | DG Declaration + SDS | Shipper's Declaration + SDS | Shipping paper + SDS |
| Cost premium | 10-30% above standard rates | 50-200%+ above standard rates | 10-25% above standard rates |
| Acceptance lead time | 24-48 hours advance notice | 48-72 hours advance notice | Same day possible |
| Restrictions | Some classes deck-only | Many classes prohibited on passenger aircraft | Route restrictions near cities |
Common DG Shipping Mistakes
- Undeclared dangerous goods — The #1 violation. Shippers who don't realize their product is DG (lithium batteries in electronics, perfume samples, cleaning chemicals) face fines of $25,000-$500,000+ per incident.
- Wrong UN number or proper shipping name — Using a generic description instead of the exact regulated name invalidates the entire declaration.
- Non-UN-certified packaging — Using standard boxes instead of tested DG packaging. Even if the product arrives safely, the shipper is in violation.
- Incomplete Dangerous Goods Declaration — Missing emergency contact, wrong packing group, or unsigned declaration causes automatic cargo rejection.
- Exceeding quantity limits for air transport — Air freight has strict per-package quantity limits. Exceeding them can result in criminal charges.
- Missing or incorrect hazard labels — Each package must display the correct diamond-shaped hazard label for its class, plus any subsidiary risk labels.
Lithium Battery Shipping Rules
Lithium batteries are the most commonly shipped dangerous good and the most frequently violated. They fall under Class 9 and are regulated under UN3480 (lithium ion, standalone), UN3481 (lithium ion, packed with or in equipment), UN3090 (lithium metal, standalone), and UN3091 (lithium metal, packed with or in equipment).
For air freight, standalone lithium ion batteries are restricted to cargo aircraft only and cannot exceed 35 kg per package. Batteries packed with equipment have higher limits but still require Section II or Section IB packaging. Every package must have the lithium battery handling label and comply with state of charge requirements (max 30% for standalone batteries by air).
For ocean freight, lithium batteries have fewer restrictions but still require DG declaration, proper packaging, and correct marking. Large-format batteries (like EV batteries) may require special stowage arrangements.
DG Shipping Costs
Dangerous goods shipments typically cost 10-200% more than standard cargo, depending on the mode and class. Ocean DG surcharges range from $100-$500 per container for lower-risk classes, up to $1,000+ for high-risk cargo requiring special stowage.
Air freight DG surcharges are significantly higher: $0.50-$3.00 per kg on top of the standard air rate, plus a flat DG handling fee of $50-$200 per shipment. Some carriers charge premium rates for radioactive materials (Class 7) and certain Class 1 explosives.
Beyond carrier surcharges, factor in DG-certified packaging costs ($20-$200+ per UN-spec container), DG declaration preparation fees ($50-$150 per shipment if outsourced), and potential inspection delays that add warehousing costs.
Dangerous Goods Shipping FAQ
What are the Class 9 dangerous goods shipping requirements?
Class 9 (miscellaneous dangerous goods) covers substances that present a transport hazard not covered by Classes 1-8 — most commonly lithium-ion and lithium-metal batteries (UN 3480, UN 3481, UN 3090, UN 3091), dry ice, magnetized materials, and environmentally hazardous substances. Requirements: UN-certified packaging tested to the Packing Group assigned (usually PG II or III), Class 9 diamond label plus any applicable handling marks (lithium battery mark for most battery shipments), a signed Dangerous Goods Declaration, and a Safety Data Sheet. For air, IATA DGR Section II/IA rules apply with strict watt-hour and state-of-charge limits; for ocean, IMDG Code Amendment 42-24 governs. Mis-shipping Class 9 lithium batteries is the single most common HAZMAT violation caught by carriers.
How do I ship hazardous materials internationally?
International HAZMAT shipping follows three layered rules: (1) the mode regulation — IATA DGR for air, IMDG Code for ocean, ADR/49 CFR for ground; (2) the origin and destination country overlays — for example 49 CFR Subchapter C in the US, ADR in the EU; (3) carrier-specific embargoes, which are often stricter than the base regulation. Process: classify the substance with its UN number, select UN-certified packaging, mark and label according to mode, prepare a Dangerous Goods Declaration signed by a currently-certified shipper, and book with a forwarder whose partner network handles the assigned class. Suaid Global coordinates DG shipments through DG-certified partners in our FMC-licensed NVOCC and IATA-accredited agent network — classification and declarations are reviewed before booking to prevent rejection at origin.
What is the difference between IMDG and IATA dangerous goods rules?
IMDG Code governs dangerous goods by ocean, IATA DGR governs them by air, and the two are not interchangeable. Air limits are much stricter: smaller maximum net quantities per package, tighter lithium battery state-of-charge and watt-hour caps, mandatory passenger vs cargo aircraft distinction (PAX/CAO), and a 2-year recertification cycle for shippers. IMDG allows larger quantities, bulk packaging, and tank containers, with a 3-year recertification cycle aligned to 49 CFR for US shippers. A shipment legally prepared for ocean under IMDG will frequently fail IATA acceptance without repackaging, relabeling, and a new declaration. Plan the mode before classifying packaging — switching modes mid-booking almost always means starting over.
Does a Safety Data Sheet (SDS) count as a dangerous goods declaration?
No. An SDS is a product safety reference document (16 sections, GHS format) — it identifies hazards but does not authorize transport. A Dangerous Goods Declaration (DGD) is a separate, mode-specific transport document signed by a currently-certified shipper that states the UN number, proper shipping name, class, packing group, quantity, packaging type, emergency contact, and a legal compliance statement. Carriers require both for most DG bookings: the SDS to verify classification, the DGD to accept the cargo. Missing or inconsistent information between the two is the most common reason DG shipments are rejected at origin CFS or cargo terminals.
Do I need special training to ship dangerous goods?
Yes. IATA and IMDG regulations require that anyone involved in preparing, offering, or transporting dangerous goods must receive certified DG training. Training must be renewed every 2 years (air) or 3 years (ocean). Your freight forwarder can handle DG logistics, but the shipper still must accurately classify and declare the goods.
Can all freight forwarders handle dangerous goods?
No. DG handling requires specialized knowledge, certifications, and carrier relationships. Many freight forwarders outsource DG shipments or decline them entirely. Look for forwarders with dedicated DG departments and IATA/IMDG-certified staff.
What happens if I ship undeclared dangerous goods?
Penalties range from $25,000 to $500,000+ per violation in the US (49 CFR), with potential criminal prosecution. Internationally, IATA airlines can fine shippers and ban them. The cargo will be seized and the shipper is liable for all costs including disposal.
Are lithium batteries always classified as dangerous goods?
Yes, but small quantities in or with equipment may qualify for exemptions under Section II of the IATA DGR or special provision 188 of the IMDG Code. Even exempt shipments require lithium battery handling labels and specific packaging.
Can dangerous goods be shipped by express courier?
DHL, FedEx, and UPS all accept certain DG classes through their specialized DG services, but with strict limits. Class 1 (explosives), Class 7 (radioactive), and certain Division 6.2 (infectious) substances are generally prohibited via express.
What is a Safety Data Sheet (SDS)?
An SDS is a standardized 16-section document that provides information about a chemical substance's hazards, handling, storage, and emergency procedures. It's required for all DG shipments and must be current (within 3-5 years of issue date).
How far in advance should I book a DG shipment?
Book at least 1-2 weeks before cargo ready date for ocean DG, and 2-3 weeks for air DG. Submit complete documentation (DG declaration, SDS, all permits) at least 48-72 hours before the shipment to avoid rejection.
Need to Ship Dangerous Goods?
We coordinate shipments across all 9 hazard classes by ocean, air, and ground through certified DG partner carriers. From classification to delivery, we ensure full compliance.
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