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UN 3468 HYDROGEN IN A METAL HYDRIDE STORAGE SYSTEM: class, labels, packing group and ADR tunnel code

UN 3468 in the dangerous goods lists of ADR 2025 (road) and the IMDG Code (sea). The proper shipping name, class and packing group come from your safety data sheet, section 14: pick the entry that matches it.

Checked against the sources on 27 October 2026

The line on the transport document

ADR 5.4.1.1.1 asks for the UN number, the proper shipping name, the labels (or the class), the packing group and the tunnel code, in this order and with nothing in between. For each entry:

  • UN 3468 HYDROGEN IN A METAL HYDRIDE STORAGE SYSTEM, 2.1, (D)
  • UN 3468 HYDROGEN IN A METAL HYDRIDE STORAGE SYSTEM CONTAINED IN EQUIPMENT, 2.1, (D)
  • UN 3468 HYDROGEN IN A METAL HYDRIDE STORAGE SYSTEM PACKED WITH EQUIPMENT, 2.1, (D)
  • A special provision in Column (6) can change the labels; read the special provisions in the table below before you print.
  • The tunnel code is needed only when the route passes a tunnel with restrictions; "(─)" is written where Table A gives none.
  • Quantity, packages, consignor and consignee complete the document (5.4.1.1.1 (e) to (h)).

Road: ADR 2025, Table A

Proper shipping name and descriptionClassClassification codePacking groupLabelsSpecial provisionsLimited quantityExcepted quantityTransport categoryTunnel codeHazard number
HYDROGEN IN A METAL HYDRIDE STORAGE SYSTEM21Fnone2.1321, 3560E02Dnone
HYDROGEN IN A METAL HYDRIDE STORAGE SYSTEM CONTAINED IN EQUIPMENT21Fnone2.1321, 3560E02Dnone
HYDROGEN IN A METAL HYDRIDE STORAGE SYSTEM PACKED WITH EQUIPMENT21Fnone2.1321, 3560E02Dnone

Sea: IMDG Code, Amendment 42-24

Proper shipping name and descriptionClassSubsidiary hazardPacking groupMarine pollutantLimited quantityExcepted quantityEmSStowage category
HYDROGEN IN A METAL HYDRIDE STORAGE SYSTEM2.1nonenonenone0E0F-D, S-UD
HYDROGEN IN A METAL HYDRIDE STORAGE SYSTEM CONTAINED IN EQUIPMENT2.1nonenonenone0E0F-D, S-UD
HYDROGEN IN A METAL HYDRIDE STORAGE SYSTEM PACKED WITH EQUIPMENT2.1nonenonenone0E0F-D, S-UD

Labels, safety data sheet and the full list

This page does not classify a substance: the UN number and packing group come from the manufacturer's classification. Air transport (IATA) is not covered, nor are segregation, stowage rules beyond the category, or national exemptions. Data: ADR 2025 and IMDG Code, Amendment 42-24, downloaded from BAM on 2026-10-27. Changes: selected columns, headings and explanations added; the values are as BAM publishes them.