Rex's Freight Notes
Dangerous Goods Classification: Start with the Product
“Chemical,” “pharmaceutical” and “new energy” describe markets. They do not settle a transport classification. Before discussing how a shipment moves, establish exactly what the goods are and how they will be offered for carriage.
Written by Rex Xu·Shanghai, China
Shanghai Dangerous Goods & International Freight Forwarding Expert
Published
Updated
2 min read
What should I send? View the enquiry checklist
Short Answer
A dangerous goods classification needs a basis in the actual product and the applicable rules, not merely its industry, intended use or a familiar sales description. Bring the product information, shipping configuration and existing classification evidence together for review. Mark unresolved points clearly. This page organises the questions; it does not classify a product or list categories accepted on every route.
Classification, packing and acceptance remain subject to the current edition of applicable regulations, carrier review and port requirements. Confirm before shipment.
Why is an industry description not enough?
An exporter may describe its business as pharmaceuticals, pesticides, flavours or food ingredients. That tells us about the market, not the transport status of each product. A familiar end use should not be used to bypass a product-specific check.
Provide the precise product reference and explain whether the goods are raw materials, a mixture, equipment or a vehicle. The enquiry should describe what will physically be handed over, not only what appears in a sales brochure.
What information belongs in the first enquiry?
Include the relevant product documentation, available transport classification information, packaging and current condition. Flag changes to the model, formulation or configuration rather than forwarding an older attachment without explanation.
Technical parameters should come from—and be explained by—the appropriate issuer. If evidence is incomplete, identify who can provide it or assess the issue. Neither a salesperson nor a forwarder should assemble a classification from disconnected numbers.
Why retain more than the primary class field?
Other hazards, packaging information and conditions shown in the supporting material may need attention. Do not reduce the entire submission to one class field, or assume that every shipment must have a packing group.
The customer is not being asked to carry out an expert assessment. The purpose is to avoid losing material information during handover. Preserve the original basis so the relevant parties can determine which fields and conditions apply.
What should happen when information conflicts?
Identify the precise issue: a document for the wrong product, contradictory technical statements, or a change in the goods being offered. Assign the question to someone able to explain or provide the evidence, and retain the response version.
If packaging, pricing or a sailing has already been discussed, tell the affected parties which assumptions remain open. This helps distinguish preparation that can continue from commitments that should wait.
What does experienced forwarding coordination contribute?
My role is to identify gaps in the initial plan and coordinate the questions between the customer, document issuers and operations colleagues. My background began in LCL operations before moving into DG logistics; the practical focus remains the connection between early information and later arrangements.
Send confirmed facts and open questions separately. We can then discuss FCL or LCL, packaging coordination and timing without treating an unsupported assumption as an established classification or an accepted booking.
What a review is not
A carrier review is an assessment against that carrier's own current requirements, made by the carrier. It is not a guarantee, and it is not something a forwarder can convert into one. What we can do is make the submission accurate and complete, and tell you early when something will not work.
Sources and scope
These official references provide background, not a complete shipment checklist or acceptance approval. US guidance from PHMSA or OSHA does not replace Shanghai export requirements. Confirm the applicable rules and carrier requirements for the actual shipment.
Common questions
- Is every chemical product dangerous goods?
- Do not decide from the industry name alone. Check the actual product and transport information; equally, a food or pharmaceutical use does not establish general-cargo status.
- Is one SDS field sufficient?
- First confirm the document belongs to the actual product and that the information is consistent. Ask the issuer to clarify material discrepancies.
- Can a single technical value determine the classification?
- This page does not provide such a decision rule. Technical data must be assessed in the context of the actual product and applicable requirements by the appropriate party.
- Must every dangerous goods shipment have a packing group?
- No. Establish whether it applies, and distinguish not applicable from pending confirmation. Do not select a group merely to complete a form.
- Does a confirmed classification mean the cargo can be dispatched?
- Packaging, documents, service acceptance and operational timing still need to be addressed. Classification is a basis for those discussions, not confirmation of all of them.
- Can Rex provide the final technical classification?
- Send the available information for an initial discussion. Where technical assessment or testing evidence is needed, obtain it from the appropriate responsible party; forwarding coordination does not replace it.
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UN Number: What to Check Before Booking
Link the UN number to the actual product and supporting information.
UN Packaging Marks: What They Do Not Prove
Packing proposals, evidence and change notification before dispatch.
China DG Export: Packaging, Maritime and Customs
Different documents, different purposes: coordinate the actual shipment.
Tell me the cargo and the required arrival date
Cargo name, UN number if you have it, quantity, packaging, destination and the date it has to be there. If the classification is unsettled, say so and attach the MSDS.