Dangerous Goods Declaration: IMDG Compliance for Shippers

You ship perfume, lithium batteries, or aerosol cans. On your commercial invoice, they look like ordinary consumer products. But under the IMDG Code, they are classified as dangerous goods — and every one of them requires a Dangerous Goods Declaration before it boards a vessel.

This guide explains what a DGD is, which products require one, what information it must contain, and what happens when you get it wrong.

What is a Dangerous Goods Declaration?

A Dangerous Goods Declaration (DGD) is a legal document required under the International Maritime Dangerous Goods (IMDG) Code for every sea shipment containing hazardous materials. The shipper signs it to confirm that the cargo is correctly classified, packaged, marked, labeled, and placarded for transport.

The IMDG Code has been mandatory under the SOLAS Convention since January 1, 2004, according to the International Maritime Organization (IMO). It covers all dangerous goods in packaged form carried by sea. The Code was first introduced in 1965 as a recommendation and became enforceable through SOLAS Chapter VII.

The DGD can be combined with the Container Packing Certificate into a single document using the IMO's Multimodal Dangerous Goods Form. This is common practice for containerized shipments.

What everyday products count as dangerous goods?

Many common consumer and industrial products are classified as dangerous goods under the IMDG Code. If you export cosmetics, electronics, household chemicals, or automotive parts, you may already be shipping dangerous goods without realizing it.

The IMDG Code organizes hazardous materials into nine classes based on their primary hazard:

Class 1: Explosives — fireworks, ammunition, flares
Class 2: Gases — aerosol cans, propane, fire extinguishers
Class 3: Flammable Liquids — perfume, nail polish, paint, ethanol
Class 4: Flammable Solids — matches, magnesium, sulfur
Class 5: Oxidizing Substances — hydrogen peroxide, ammonium nitrate fertilizers
Class 6: Toxic and Infectious Substances — pesticides, medical waste
Class 7: Radioactive Material — smoke detectors, medical isotopes
Class 8: Corrosives — batteries (lead-acid), bleach, cleaning acids
Class 9: Miscellaneous — lithium-ion batteries, dry ice, magnetized materials

According to Dimerco, roughly 10% of all containers shipped by sea carry dangerous or hazardous goods. Many of these are consumer products that shippers handle every day.

What information does a DGD require?

The DGD must contain specific data points defined in IMDG Code Section 5.4. Missing or incorrect information can result in the shipment being rejected at the terminal. The required fields include:

UN Number: A four-digit code identifying the substance (e.g., UN 1203 for gasoline)
Proper Shipping Name (PSN): The standardized name from the IMDG Dangerous Goods List — trade names are not accepted
Hazard Class and Division: The IMDG class number (e.g., Class 3 for flammable liquids)
Packing Group: I (high danger), II (medium), or III (low) — where assigned
Marine Pollutant Status: Whether the substance is classified as harmful to the marine environment
Quantity and Packaging Type: Net weight or volume, and the packaging description
Shipper's Signed Declaration: A statement that the cargo complies with all applicable regulations

According to the IMO's Multimodal Dangerous Goods Form, the shipper must declare that the goods are "fully and accurately described by the Proper Shipping Name" and are "in all respects in proper condition for transport." This signature carries legal weight.

In addition to the DGD, you may also need a Container/Vehicle Packing Certificate confirming the container was packed, secured, and segregated correctly. A Safety Data Sheet (SDS or MSDS) is typically required by the shipping line before booking acceptance.

What happens if you ship without a proper DGD?

Shipping dangerous goods without a correct declaration triggers penalties at two levels: the carrier and the government. Both can be severe, and they stack.

Carrier penalties are the first line of enforcement. Major shipping lines have implemented misdeclaration fees that apply per container or per bill of lading:

Maersk: $5,000 per bill of lading globally, $15,000 per container for shipments from China (Maersk Customer Advisory, 2025)
Hapag-Lloyd: $15,000 per container (effective September 2019)
Evergreen: $35,000 per container for misdeclared dangerous goods

These are administrative fees only. The shipper also bears all costs for corrective measures, claims, fines, and damages.

Government penalties add another layer. In the United States, the maximum civil penalty under 49 CFR is $83,439 per violation per day. If the violation results in injury, death, or property damage, the maximum increases to $194,691 per violation per day.

The safety consequences are real. According to the Allianz Safety and Shipping Review (2023), industry reporting systems attribute roughly 25% of serious incidents on container ships to misdeclared dangerous goods. The Allianz Safety and Shipping Review (2025) reported 250 fire and explosion incidents across all vessel types in 2024 — the highest number in a decade and a roughly 20% increase year-on-year. Over 100 vessels have been lost to fire in the past 10 years.

A well-known case is the KMTC Hong Kong in 2019. Containers of calcium hypochlorite — a Class 5.1 oxidizer — were deliberately declared as "dolls" to avoid dangerous goods surcharges and carrier restrictions. The resulting fire and explosion at a Thai port caused significant damage, according to Maritime Mutual.

The National Cargo Bureau (NCB) ran a container inspection initiative in partnership with Maersk, Hapag-Lloyd, and CMA-CGM. The results were alarming: 55% of inspected containers were noncompliant, with 43% failing due to poorly secured dangerous goods and 6.5% carrying misdeclared dangerous cargoes. A subsequent NCB inspection program in South Africa found a 74% failure rate, with 37% of containers containing misdeclared or undeclared dangerous goods.

How do you stay compliant with the IMDG Code?

Compliance starts before the cargo reaches the port. If your product appears on the IMDG Dangerous Goods List, you need to build the DGD into your standard shipping workflow. Here is a practical checklist:

Check the SDS first. Your product's Safety Data Sheet (Section 14: Transport Information) will tell you the UN number, hazard class, packing group, and proper shipping name
Use the Proper Shipping Name. Trade names, marketing names, and invoice descriptions are not accepted on a DGD. Use only the name from the IMDG Dangerous Goods List
Match packaging to packing group. All packaging must be UN-approved and rated for the assigned packing group. Packing Group I requires the highest performance standard
Label and placard correctly. The package must show the UN number, proper shipping name, and hazard diamond. Containers must display corresponding placards
Train your people. Under the IMDG Code, anyone involved in classifying, packing, marking, or signing DGD paperwork must receive dangerous goods training. This includes freight forwarders and warehouse staff
Submit early. Most shipping lines require the DGD and SDS before the dangerous goods booking cut-off, which is typically days before the standard documentation deadline
Keep records. Retain copies of DGDs, packing certificates, and SDS documents. Carriers and regulatory authorities may request them during inspections or audits

The IMDG Code is updated on a two-year cycle. The current edition is Amendment 42-24 (2024 Edition). Each amendment is valid for three years, with a one-year overlap where either the old or new version may be used. Using an outdated edition puts you out of compliance.

If you handle hazardous materials regularly, invest in cargo screening software to validate DGDs against the IMDG Dangerous Goods List before submission. Several major container lines already use AI-powered screening to flag suspicious bookings and misdeclared cargo.