The supplier's safety data sheet (SDS) gives UN1263, and the booking desk asks which packing group applies. The Dangerous Goods List (DGL) has three rows for UN1263. Before selecting one, match the product and revision of the SDS to the goods offered for transport, then obtain the packing group and classification basis for that product.
Open the row that matches the evidence
In the UN1263 record, open “Compare all 3 DGL entries.” The rows shown below are from IMDG 42-24. They are useful for checking whether the booking file has drawn its fields from a single row.
| Packing group | Limited quantities, column 7a | Excepted quantities, column 7b |
|---|---|---|
| I | 500 mL | E3 |
| II | 5 L | E2 |
| III | 5 L | E1 |
The table reproduces selected fields for comparison. If a quantity provision is being considered, read the applicable chapter and special provisions alongside the chosen row and the actual package configuration.
Trace a mismatch before correcting the form
Suppose an SDS lists UN1263 and packing group II for sea transport, but the booking worksheet says E1. E1 appears on the packing group III row. Confirm that the SDS and worksheet refer to the same product, formulation and transport mode. Ask the issuer to confirm the applicable classification and clarify whether the worksheet is actually claiming an excepted-quantity provision. Record the reply before replacing any field.
A common reason to compare the rows is that the packing group may drive several other fields. Once the classification is confirmed, check the applicable packing instructions, special provisions and stowage information on that same row. If the carrier is asking for a special handling or packaging decision, send the relevant package details with the confirmed classification.
Ask for evidence for this consignment
Please confirm the product name and formulation covered by this SDS revision, the sea-transport classification and packing group, and the supporting classification basis. If a quantity provision is claimed, specify the applicable provision and actual inner and outer packaging. Please flag any differences between the SDS and the booking description.
For a kit, identify each component as it will actually be offered for transport. Check whether the components have separate safety data sheets and how they will be packed. If the classification remains unclear, send the file to the person responsible for classification before the declaration is finalised.
Keep a row reference in the booking file
Save the rule edition, the product and SDS revision, the confirmed packing group and a reference to the DGL row. For example, if packing group II has already been confirmed, link to UN1263, packing group II. A colleague taking over the file can then compare the same row when the packaging or booking changes.
Sources and scope
IMDG 42-24, 2.3.2, Dangerous Goods List UN1263 and chapters 3.4 and 3.5. The worksheet scenario is illustrative.
- IMO MSC.556(108): Class 3 packing groups and DGL UN1263, columns 5, 7a and 7b
- IMO: current IMDG Code edition and published corrections
The explanations are editorial guidance, with automated tools used to assist source and consistency checks. No independent professional review or assessment of a specific consignment is claimed. Report a discrepancy to support@imdgseek.com.