Shipping UN3077 and UN3082 from China: Why Carrier Rejections Happen
Many importers first encounter UN3077 or UN3082 through a carrier rejection. The booking goes in, the cargo is described as general chemicals or industrial products, and the carrier comes back with a refusal - because the SDS identifies it as an environmentally hazardous substance requiring a DG declaration.
This happens more often than it should. These products look ordinary in storage. They are not flammable, not corrosive, not toxic to people. But if they are harmful to aquatic ecosystems, they qualify as Class 9 dangerous goods under international shipping rules - and they carry labeling, packaging, and documentation requirements that most importers are not aware of until something goes wrong.
This guide covers what UN3077 and UN3082 mean in practice, what the shipping process requires, where the costs sit, and what the US and EU expect when these products arrive.
Is your product classified as UN3077 or UN3082?
UN3077 covers environmentally hazardous solids. UN3082 covers environmentally hazardous liquids. Both fall under Class 9 dangerous goods.
The classification is based entirely on environmental impact - a product can be safe to handle and still qualify if it is harmful to aquatic ecosystems, builds up in living organisms, or breaks down slowly in the environment.
Products that commonly carry this classification:
Agricultural pesticides and herbicides
Industrial lubricants and metal-working fluids
Paint additives and coating compounds
Antifreeze and engine coolant
Products containing heavy metal compounds such as zinc, copper, or lead
How to check if your product is UN3077 or UN3082
Check Section 14 of the supplier's SDS. If it shows UN3077 or UN3082, the product is classified as dangerous goods for shipping. If Section 14 is blank or says "not regulated," ask the supplier to verify with an accredited Chinese testing body.
A blank Section 14 is not confirmation that no classification applies. Incomplete SDS documents are common from Chinese suppliers, and a missing entry in Section 14 is one of the most frequent gaps we see.
If the product contains any of the categories listed above, do not assume it is non-DG without written confirmation.
What makes environmentally hazardous substances harder to ship
UN3077 and UN3082 sit at Packing Group III - the lowest risk tier in the dangerous goods system. Most products in this classification move by sea in standard dry containers without unusual physical restrictions. The difficulty is not operational - it is administrative.
Three things consistently cause problems for importers:
1 The classification is easy to miss
These products look like ordinary goods in storage. Suppliers do not always flag them as DG when quoting, and importers often only discover the status at the carrier booking stage - when the vessel cutoff is close and options are limited.
2 Labeling has more layers than expected
A Class 9 label alone is not enough. The marine pollutant mark is a separate requirement, and it must appear on both the individual packages and all four sides of the container at different minimum sizes. Many suppliers handle the package mark but miss the container mark entirely, which is one of the most common reasons for port holds.
3 Leakage prevention is closely inspected
Because the hazard is environmental, port inspectors pay specific attention to whether the outer packaging can contain the full contents if the inner packaging fails, and whether UN3082 liquid containers have been filled beyond capacity.
The sections below cover each of these areas in detail.
How much does it cost to ship UN3077 and UN3082 from China
DG surcharge
Ocean carriers typically charge $150-300 per container for Class 9 PG III cargo - at the lower end of DG surcharges. For comparison, Class 5.1 oxidizers or Class 6.1 toxic substances attract $400-800 per container. The lower rate reflects the lower risk tier, which is worth knowing when budgeting against other DG categories.
Packaging cost premium
UN-certified drums, IBCs, or outer cartons typically cost 20-40% more than standard commercial packaging. This cost sits with the supplier but flows through to the FOB price. If your supplier quotes standard packaging and the product turns out to be UN3077 or UN3082, expect the unit cost to increase once compliant packaging is factored in.
Ullage and fill volume
UN3082 liquid containers must not be filled to capacity - a ullage gap is required to allow for expansion during transport. For bulk liquid orders, this means the actual product volume per drum or IBC is lower than the container's stated capacity. This can add 5-10% to the effective per-unit freight cost. Confirm the actual fill volume with your supplier before placing the order, not after the shipment arrives short.
EU documentation risk
Rotterdam and Hamburg apply active enforcement to marine pollutant markings. An incomplete SDS Section 14, a missing container placard, or a DG declaration without the technical chemical name is enough to trigger a hold.
Port storage fees in Northwest Europe accumulate fast - a three-day hold can cost more than the DG surcharge on the entire shipment. This risk is specific to EU-bound cargo and is covered in more detail in the destination section below.
Sea freight and air freight options for UN3077 and UN3082
Sea freight
Most UN3077 and UN3082 shipments move by sea in standard dry containers, with cargo packed inside UN-certified drums, IBCs, or bulk bags. No special container type is required for most products in this classification.
For smaller volumes, LCL is available - but confirm with your freight forwarder before booking. Some LCL consolidators have blanket policies against DG cargo regardless of risk tier, and discovering this after the cargo is ready causes unnecessary delays.
Air freight
Air freight is available for both UN3077 and UN3082. For small shipments where each inner package contains no more than 5 litres (UN3082) or 5 kg (UN3077), a quantity exemption under IATA Special Provision A197 removes the DG surcharge and DG declaration requirement. This makes air freight significantly more cost-effective for samples and small trial orders.
For full commercial volumes, standard IATA DG requirements and surcharges apply. The cost difference between the exemption threshold and full DG air freight is substantial, so it is worth structuring sample shipments to stay within the inner package limits where possible.
Packaging requirements for UN3077 and UN3082
UN-certified packaging
All packaging must carry a UN performance marking - the code stamped or printed on the drum, IBC, or outer box confirming it passed PG III tests. Standard commercial containers without this marking are not acceptable for sea freight. Ask the supplier to confirm the UN marking before production begins, not at the point of booking.
For UN3082 liquids, confirm with the supplier that containers are not filled to capacity. The required ullage is specified in the SDS under storage and handling conditions.
Choosing the right format
Drums (200L) - Most common for mid-volume orders. UN-certified steel or plastic drums, loaded inside a standard dry container.
IBCs (1,000L) - More cost-efficient per litre for larger orders, provided the IBC material is compatible with the specific product. Also loaded inside a standard dry container.
ISO tanks - For very high volumes, typically above 15,000 litres. Lower freight cost per litre, but tank cleaning fees and rental or interchange fees add costs that importers often overlook. Confirm these with the supplier and tank operator before placing the order.
UN3077 solids do not use ISO tanks. They move in bulk bags or standard drums, loaded inside a standard dry container.
Required marks on each package
Each individual package needs three marks:
Class 9 hazard label (black and white diagonal stripes, diamond shape)
Marine pollutant mark (fish and tree symbol), minimum 100mm x 100mm
UN number and proper shipping name, including the technical chemical name in parentheses
The container needs the marine pollutant mark on all four sides, minimum 250mm x 250mm. This is a separate requirement from the package-level mark and is frequently missed.
DG declaration
The DG declaration must include:
Full proper shipping name with the technical chemical name in parentheses
UN number (UN3077 or UN3082)
Class (9) and packing group (III)
The words MARINE POLLUTANT at the end of the description
The SDS must be provided in both English and Chinese, with a complete Section 14. A DG declaration submitted without the technical chemical name in parentheses will be rejected by most carriers.
UN3077 and UN3082 Import Requirements for the US and EU
Importing UN3077 and UN3082 into the United States
Sea freight from China follows standard IMDG requirements - full DG documentation, UN-certified packaging, and marine pollutant markings on packages and container.
Once the cargo clears US customs and moves by truck to its final destination, the rules change. US federal regulations do not classify marine pollutants as regulated dangerous goods for domestic highway transport in non-bulk packaging.
Inland delivery from the US port to your warehouse typically carries no DG premium, which is a meaningful cost difference compared to EU destinations.
One exception is worth confirming with your freight forwarder. Some products in this classification also meet the US definition of a Reportable Quantity substance - where a spill above a certain threshold triggers mandatory federal reporting.
If your product falls into this category, additional requirements apply for domestic trucking as well.
Importing UN3077 and UN3082 into the European Union
EU sea freight requirements follow IMDG. The difference begins after the cargo arrives at the destination port.
Under ADR, environmentally hazardous substances remain classified as dangerous goods for road transport within the EU. The classification does not drop away at the port gate - delivery from the EU port to your warehouse carries DG requirements and associated costs. This is a direct contrast to the US, where the DG classification effectively ends at the port.
Rotterdam and Hamburg customs teams specifically check marine pollutant documentation on arrival. The two most common gaps found at these ports:
DG declaration using only the generic shipping name, without the technical chemical name in parentheses
Container with package-level marks but no placards on all four sides
Either gap is enough for a hold. For EU-bound shipments, documentation needs to be reviewed and confirmed complete before the cargo leaves China.
Five mistakes importers make with UN3077 and UN3082
1. Relying on the supplier to flag DG status
Suppliers in China are not required to identify dangerous goods classification when quoting. Many do not. Reading Section 14 of the SDS before placing an order is the importer's responsibility - waiting for the supplier to raise it is how most carrier rejections happen.
2. Treating a blank SDS Section 14 as non-DG confirmation
A blank or "not regulated" Section 14 does not confirm the product has no DG classification. For products containing pesticide components, heavy metals, or industrial chemicals, request written verification from an accredited Chinese testing body before treating the product as non-DG.
3. Missing the container-level marine pollutant placard
The 100mm package label and the 250mm container placard are two separate requirements. The placard must appear on all four sides of the container. This is consistently one of the most cited reasons for inspection holds at EU entry ports, and it is easy to prevent by asking the supplier for photos of the loaded container before departure.
4. Missing technical chemical name in shipping documents
The specific chemical component that triggers the classification must be named in the shipping documents. A generic description alone is not acceptable - carriers and port authorities at both origin and destination will reject documents that do not identify the actual substance. Without it, carriers or port authorities may reject the DG declaration or bill of lading outright.
5. Not accounting for ullage when calculating order volumes
For UN3082 liquids, drums and IBCs must not be filled to capacity. Importers who calculate order quantities based on the stated volume of containers will receive less product per container than expected. Confirm the actual fill volume with the supplier before placing the order.
Ship environmentally hazardous goods from China with Gerudo Logistics
Gerudo Logistics specializes in dangerous goods and reefer shipping from China, handling all hazard classes, including Class 9 environmentally hazardous substances under UN3077 and UN3082. Our operations cover Guangzhou, Shenzhen, Shanghai, Ningbo, Qingdao, and Dalian.
Our team review the SDS, verify that the technical chemical name is present in Section 14, and confirm that packaging and labeling meet IMDG requirements before the cargo is loaded. Documentation errors that would cause a hold at Rotterdam or Houston are identified and corrected at origin, not at the destination port.
We handle all packaging formats - drums, IBCs, ISO tanks, and bulk bags - and manage the full process from factory pickup through Chinese customs clearance, ocean freight, and final delivery. For EU-bound shipments, we coordinate DG documentation against ADR requirements for inland delivery, so compliance issues at the port gate do not fall on you.
Contact our team to discuss your UN3077 or UN3082 shipment from China.
Frequently asked questions
How do I know if my product is UN3077 or UN3082?
Check Section 14 of the supplier's SDS. If it shows either UN number, the product is classified as dangerous goods for shipping. If Section 14 is blank or incomplete, request verification from an accredited Chinese testing body before treating the product as non-DG.
Is UN3077 or UN3082 considered high-risk?
No. Both sit at Packing Group III, the lowest risk tier in the dangerous goods system. The hazard is environmental - harm to aquatic ecosystems - not to people. Carrier surcharges and handling requirements are less demanding than for Class 5.1 oxidizers or Class 6.1 toxic substances. The main compliance challenge is documentation accuracy, not physical handling.
Can I ship UN3077 or UN3082 by air from China?
Yes. For small shipments where each inner package contains no more than 5 litres (UN3082) or 5 kg (UN3077), a quantity exemption under IATA Special Provision A197 removes the DG surcharge and DG declaration requirement. For full commercial volumes, standard IATA DG requirements apply. This exemption is most useful for samples and trial orders sent ahead of a larger sea freight shipment.
Are there small quantity exemptions for sea freight?
Yes. Under IMDG Special Provision 375, packages with less than 5 litres (UN3082) or 5 kg (UN3077) per inner package are exempt from full IMDG dangerous goods requirements. The exemption applies to the inner package level, not the total shipment weight. It is most relevant for mixed pallets or sample assortments where individual units fall below the threshold.
What happens if the marine pollutant mark is missing?
At Chinese export ports, missing marks can result in a hold before loading. At EU ports, particularly Rotterdam and Hamburg, missing container-level placards commonly trigger documentary holds and demurrage charges. Asking the supplier to send photos of the loaded and sealed container before departure is a practical way to catch labeling gaps before they become port delays.
What is the key difference between the US and EU on arrival?
In the US, marine pollutant classification does not apply to domestic highway transport in non-bulk packaging - inland trucking from the port to your warehouse typically carries no DG premium. In the EU, ADR applies throughout the inland journey, so the DG classification and its associated costs continue until final delivery. EU ports also apply stricter documentation checks on arrival, making pre-departure review more important for EU-bound shipments.
Do I need special packaging?
Yes. UN-certified packaging with a UN performance marking is required for sea freight. For UN3082 liquids, containers must not be filled to capacity - the required ullage is in the SDS under storage and handling conditions. Standard commercial packaging without UN markings is not acceptable.
Conclusion
UN3077 and UN3082 are among the most frequently misdeclared product categories in China export shipping. Check Section 14 of the SDS before your next order, confirm packaging and labeling requirements with your supplier, and have documentation reviewed before the cargo is loaded.
